Editing DuPage County, Illinois

{{Short description|County in Illinois, United States}}
{{Use mdy dates|date=April 2024}}
{{Infobox U.S. county
 | county               = DuPage County
 | state                = Illinois
 | type                 = County
 | seal                 = Seal of DuPage County, Illinois.png
 | founded year         = 1839
 | founded date         = February 9
 | seat wl              = Wheaton
 | largest city         = [[Aurora, Illinois|Aurora]]{{efn|A small portion of [[Chicago]] is located within DuPage County but does not have a significant population}}
 | motto                = The Magnificent Miles West of Chicago
 | area_total_sq_mi     = 336
 | area_land_sq_mi      = 327
 | area_water_sq_mi     = 8.9
 | area percentage      = 2.6
 | census yr            = 2020
 | pop                  = 932877
 | pop_est_as_of        = 2023
 | population_est       = 921213 {{loss}}
 | density_sq_mi        = 2800
 | time zone            = Central
 | area codes           = [[Area codes 630 and 331|630 and 331]]
 | district             = 3rd
 | district2            = 4th
 | district3            = 6th
 | district4            = 8th
 | district5            = 11th
 | named for            = [[DuPage River]]
 | coordinates          = {{Coord|41.85195|-88.08567|format=dms|type:adm2nd_region:US-IL_source:wikidata|display=inline,title}}
 | ex image             = {{Photomontage
| photo1a                 = Warrenvillegrove.jpg
| photo2a                 = Restored tallgrass prairie in DuPage County, Illinois.jpg
| spacing                 = 2
| position                = center
| color_border            = white
| color                   = white
| size = 280
| foot_montage            = }}
 | ex image cap         = Warrenville Grove Forest Preserve on the West Branch of the DuPage River; Restored tallgrass prairie in Dunham Forest Preserve
 | web                  = www.dupagecounty.gov
 | footnotes            = <ref>{{Cite GNIS|422191|DuPage County}}</ref>
}}
'''DuPage County''' ({{IPAc-en|d|uː|ˈ|p|eɪ|dʒ}} {{respell|doo|PAYJ}}) is a [[County (United States)|county]] in the [[U.S. state]] of [[Illinois]], and one of the [[collar counties]] of the [[Chicago metropolitan area]]. As of the [[2020 United States census|2020 census]], the population was 932,877, making it [[List of counties in Illinois|Illinois' second-most populous county]]. Its [[county seat]] is [[Wheaton, Illinois|Wheaton]].<ref name="GR6">{{cite web|url=http://www.naco.org/Counties/Pages/FindACounty.aspx|access-date=June 7, 2011|title=Find a County|publisher=National Association of Counties|url-status=dead|archive-url=https://web.archive.org/web/20110531210815/http://www.naco.org/Counties/Pages/FindACounty.aspx|archive-date=May 31, 2011}}</ref>

Known for its vast [[tallgrass prairie]]s,<ref>{{cite web |last1=Robertson |first1=Ken |title=Tallgrass Prairie: Where to see prairies |url=https://publish.illinois.edu/tallgrass-prairie/where-to-see-prairies/ |publisher=[[Illinois Natural History Survey]] |access-date=October 24, 2023}}</ref> DuPage County has become mostly developed and suburbanized, although some pockets of farmland remain in the county's western and northern parts.<ref>{{cite journal |last1=Kuethe |first1=T. |title=Changes in Farms and Farmland in Illinois |journal= Farmdoc Daily |volume=9|issue=76|publisher=Department of Agricultural and Consumer Economics, University of Illinois at Urbana-Champaign |date=April 26, 2019}}</ref> Located in the [[Rust Belt]], the area is one of few in the region whose economy quickly became dependent on the headquarters of several large corporations due to its close proximity to Chicago. As quarries closed in the 1990s, land that was formerly used for mining and plants was converted into [[Mixed-use development|mixed-use, master-planned developments]] to meet the growing tax base.<ref>{{cite web |title=Cantera Development |url=https://warrenville.il.us/252/Cantera-Development |publisher=City of Warrenville, Illinois |access-date=October 24, 2023}}</ref> The county has a mixed socioeconomic profile and residents of [[Hinsdale, Illinois|Hinsdale]], [[Naperville, Illinois|Naperville]] and [[Oak Brook, Illinois|Oak Brook]] include some of the wealthiest people in the [[Midwestern United States|Midwest]]. On the whole, the county enjoys above average median household income levels and low overall poverty levels when compared to the national average.<ref>{{Cite news|url=https://datausa.io/profile/geo/dupage-county-il/|title=DuPage County, IL|work=Data USA|access-date=October 22, 2018}}</ref>

==History==
Prior to European-American settlement, the area that is now DuPage County was inhabited by the [[Potawatomi]] people. By 1800, the Potawatomi had established 4 major villages  along local rivers within the county, and had a network of trails crisscrossing the area. The first European-American settlers arrived in what is now DuPage County in 1832, and the Potawatomi population was forced out of the region only one year later after ceding their land in the [[1833 Treaty of Chicago|Treaty of Chicago]].<ref>{{Cite web |title=DuPage County |url=http://www.encyclopedia.chicagohistory.org/pages/396.html |access-date=2024-06-20 |website=www.encyclopedia.chicagohistory.org}}</ref> DuPage County was officially formed on February 9, 1839, out of [[Cook County, Illinois|Cook County]].<ref>{{cite web|last=White|first=Jesse|title=1837-1839 — Twenty-one New Counties|url=http://www.cyberdriveillinois.com/publications/pdf_publications/ipub15.pdf|work=Origin and Evolution of Illinois Counties|publisher=[[Illinois Secretary of State]]|page=10|access-date=September 26, 2012|author-link=Jesse White (politician)|date=March 2010|url-status=live|archive-url=https://web.archive.org/web/20120806214135/http://www.cyberdriveillinois.com/publications/pdf_publications/ipub15.pdf|archive-date=August 6, 2012}}</ref> The county took its name from the [[DuPage River]], which was, in turn, named after a French fur trapper, DuPage.<ref>{{Cite web|url= http://www.dupagehistory.org/dupage_roots/Chapter2.htm|title= The French Connection|access-date= January 3, 2009|author= Thompson, Richard A.|work= History of DuPage County: DuPage Roots|publisher= DuPageHistory.org|url-status= live|archive-url= https://web.archive.org/web/20090313044556/http://www.dupagehistory.org/dupage_roots/Chapter2.htm|archive-date=March 13, 2009|df= dmy-all}}</ref> The first written history to address the name, the ''1882 History of DuPage County, Illinois'', by Rufus Blanchard, relates:<ref>{{cite web|last=Blanchard|first=Rufus|title=History of DuPage County, Illinois|work=Illinois Digital Archives|publisher=Illinois Secretary of State and State Librarian|year=1882|url=http://www.idaillinois.org/u?/npl,1195|access-date=January 3, 2009}}</ref>

<blockquote>The DuPage River had, from time immemorial, been a stream well known. It took its name from a French trader who settled on this stream below the fork previous to 1800. Hon. H. W. Blodgett, of Waukegan, informs the writer that J. B. Beaubien had often spoken to him of the old Frenchman, Du Page, whose station was on the bank of the river, down toward its mouth, and stated that the river took its name from him. The county name must have the same origin. Col Gurden S. Hubbard, who came into the country in 1818, informs the writer that the name DuPage, as applied to the river then, was universally known, but the trader for whom it was named lived there before his time. Mr. Beaubien says it is pronounced Du Pazhe (having the sound of ah, and that the P should be capitalized). This was in reply to Mr. Blodgett's inquiry of him concerning the matter.</blockquote>

[[File:DuPage County Illinois 1839.png|thumb|left|100px|DuPage County at the time of its creation in 1839]]
The first white settler in DuPage County was Bailey Hobson who, with Lewis Stewart, built a house in 1831 for the Hobson family at a site about {{convert|2|mi}} south of present-day downtown Naperville.<ref>{{Cite book|title=History of Du Page County, Illinois|url=https://archive.org/details/historyofdupagec00blan|last=Blanchard|first=Rufus|publisher=O.L. Baskin & Co. Historical Publishers|year=1882|location=Chicago|page=26}}</ref><ref>{{Cite book|title=History of Du Page County, Illinois|url=https://archive.org/details/historyofdupagec00dupa|last=Richmond|first=C.W.|publisher=Knickerbocker & Hodder|year=1877|location=Aurora, Illinois|pages=11–12}}</ref> Hobson later built a mill to serve surrounding farmers. Today, the Hobson house still stands on Hobson Road in Naperville, and the location of the mill is commemorated with a millstone and monument in today's Pioneer Park.<ref>{{Cite web|url=http://www.napersettlement.org/DocumentCenter/Home/View/303|title=Bailey Hobson: Naperville Heritage Society Stories|website=Naper Settlement|archive-url=https://web.archive.org/web/20180508151631/http://www.napersettlement.org/DocumentCenter/Home/View/303|archive-date=May 8, 2018|url-status=live|access-date=January 7, 2018}}</ref>

==Geography==
According to the [[United States Census Bureau|U.S. Census Bureau]], the county has a total area of {{convert|336|sqmi}}, of which {{convert|327|sqmi}} is land and {{convert|8.9|sqmi}} (2.6%) is water.<ref name="census-density">{{cite web|url=http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_SF1/GCTPH1.CY10/0500000US17043|access-date=July 11, 2015|title=Population, Housing Units, Area, and Density: 2010 - County|publisher=[[United States Census Bureau]]|archive-url=https://archive.today/20200212203920/http://factfinder.census.gov/bkmk/table/1.0/en/DEC/10_SF1/GCTPH1.CY10/0500000US17043|archive-date=February 12, 2020|url-status=dead}}</ref> The [[DuPage River]] and the [[Salt Creek (Des Plaines River tributary)|Salt Creek]] flow through DuPage County. According to the Forest Preserve District of DuPage County, the highest point in the county is located at the Mallard Lake Landfill, which at its highest point is {{convert|982|ft|m|0}} above mean sea level.<ref name="forestpreserve">{{cite web|url=http://www.dupageforest.com/info/envservicesfaq.html|title=Frequently Asked Questions about Environmental Services|author=Forest Preserve District of DuPage County|year=2008|access-date=January 9, 2008|archive-url=https://web.archive.org/web/20070927142140/http://www.dupageforest.com/info/envservicesfaq.html <!-- Bot retrieved archive -->|archive-date=September 27, 2007}}</ref>

===Climate===
{{climate chart
|[[Wheaton, Illinois]]
|14|32|1.85
|19|38|1.56
|28|50|2.62
|38|63|3.80
|48|75|3.94
|57|84|3.91
|63|87|3.97
|61|85|4.60
|53|78|3.38
|42|67|2.66
|32|50|3.20
|20|37|2.45
|float=right
|units=imperial
|clear=both
|source=The Weather Channel<ref name="weather">{{cite web
 |url         = http://www.weather.com/weather/wxclimatology/monthly/graph/USIL1259
 |title       = Monthly Averages for Wheaton, Illinois
 |access-date  = January 27, 2011
|publisher   = The Weather Channel
 |url-status     = live
 |archive-url  = https://web.archive.org/web/20110513092234/http://www.weather.com/weather/wxclimatology/monthly/graph/USIL1259
 |archive-date = May 13, 2011
|df          = dmy-all
}}</ref>}}

In recent years, average temperatures in the county seat of Wheaton have ranged from a low of {{convert|14|°F}} in January to a high of {{convert|87|°F}} in July, although a record low of {{convert|-26|°F}} was recorded in January 1985 and a record high of {{convert|105|°F}} was recorded in July 1995. Average monthly precipitation ranged from {{convert|1.56|in}} in February to {{convert|4.60|in}} in August.<ref name="weather"/>

===Adjacent counties===
Counties that are adjacent to DuPage include:
* [[Cook County, Illinois|Cook County]] (east and north)
* [[Will County, Illinois|Will County]] (south)
* [[Kendall County, Illinois|Kendall County]] (southwest; counties meet at a corner)
* [[Kane County, Illinois|Kane County]] (west)

==Demographics==
{{US Census population
|1840= 3535
|1850= 9290
|1860= 14701
|1870= 16685
|1880= 19161
|1890= 22551
|1900= 28196
|1910= 33432
|1920= 42120
|1930= 91998
|1940= 103480
|1950= 154599
|1960= 313459
|1970= 491882
|1980= 658835
|1990= 781666
|2000= 904161
|2010= 916924
|align-fn=center
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/prod/www/decennial.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=July 4, 2014|url-status=dead|archive-url=https://web.archive.org/web/20150426102944/http://www.census.gov/prod/www/decennial.html|archive-date=April 26, 2015}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=July 4, 2014|url-status=live|archive-url=https://web.archive.org/web/20120811110448/http://mapserver.lib.virginia.edu/|archive-date=August 11, 2012}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/il190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=July 4, 2014|url-status=live|archive-url=https://web.archive.org/web/20140424084443/http://www.census.gov/population/cencounts/il190090.txt|archive-date=April 24, 2014}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=July 4, 2014|url-status=live|archive-url=https://web.archive.org/web/20141218203824/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf|archive-date=December 18, 2014}}</ref> 2010-2019<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/17/17043.html|publisher=United States Census Bureau|access-date=July 4, 2014|url-status=dead|archive-url=https://web.archive.org/web/20110606162221/http://quickfacts.census.gov/qfd/states/17/17043.html|archive-date=June 6, 2011}}</ref>
|2020=932877
|estyear=2024
|estimate=937184
|estref=<ref name="USCensusEst2024">{{cite web|url=https://www.census.gov/quickfacts/dupagecountyillinois|title=U.S. Census Bureau Quickfacts: DuPage County, Illinois|publisher=United States Census Bureau|access-date=March 22, 2025}}</ref>}}

=== 2020 Census ===
DuPage County's population's distribution by [[Race and ethnicity in the United States Census|race and ethnicity]] in the [[2020 United States census|2020 census]] was as follows:<ref>{{cite web |title=DuPage County, Illinois |url=https://data.census.gov/cedsci/table?t=Race%20and%20Ethnicity&g=0500000US17043&tid=DECENNIALPL2020.P2 |access-date=June 28, 2022 |website=United States Census Bureau}}</ref>

{| class="wikitable"  style="text-align:center;"
|+'''DuPage County, Illinois – Racial and ethnic composition'''<br><small>{{nobold|''Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.''}}</small>
!Race / Ethnicity <small>(''NH = Non-Hispanic'')</small>
!Pop 2000<ref name=2000CensusP004>{{Cite web|title=P004: Hispanic or Latino, and Not Hispanic or Latino by Race – 2000: DEC Summary File 1 – DuPage County, Illinois|url=https://data.census.gov/table?g=050XX00US17043&tid=DECENNIALSF12000.P004|website=[[United States Census Bureau]] |access-date=}}</ref>
!Pop 2010<ref name=2010CensusP2>{{Cite web|title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2010: DEC Redistricting Data (PL 94-171) – DuPage County, Illinois|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US17043&tid=DECENNIALPL2010.P2|website=[[United States Census Bureau]]}}</ref>
!{{partial|Pop 2020}}<ref name=2020CensusP2>{{Cite web|title=P2 Hispanic or Latino, and Not Hispanic or Latino by Race – 2020: DEC Redistricting Data (PL 94-171) – DuPage County, Illinois|url=https://data.census.gov/cedsci/table?q=p2&g=050XX00US17043&tid=DECENNIALPL2020.P2|website=[[United States Census Bureau]]}}</ref>
!% 2000
!% 2010
!{{partial|% 2020}}
|-
|[[Non-Hispanic or Latino whites|White]] alone (NH)
|711,966
|646,130
|style='background: #ffffe6; |591,441
|78.74%
|70.47%
|style='background: #ffffe6; |63.40%
|-
|[[Non-Hispanic or Latino African Americans|Black or African American]] alone (NH)
|26,977
|41,024
|style='background: #ffffe6; |44,201
|2.98%
|4.47%
|style='background: #ffffe6; |4.74%
|-
|[[Native Americans in the United States|Native American]] or [[Alaska Native]] alone (NH)
|912
|992
|style='background: #ffffe6; |873
|0.10%
|0.11%
|style='background: #ffffe6; |0.09%
|-
|[[Asian Americans|Asian]] alone (NH)
|70,908
|91,793
|style='background: #ffffe6; |118,982
|7.84%
|10.01%
|style='background: #ffffe6; |12.75%
|-
|[[Native Hawaiian]] or [[Pacific Islander Americans|Pacific Islander]] alone (NH)
|180
|171
|style='background: #ffffe6; |219
|0.02%
|0.02%
|style='background: #ffffe6; |0.02%
|-
|[[Race and ethnicity in the United States census|Other race]] alone (NH)
|870
|1,181
|style='background: #ffffe6; |3,299
|0.10%
|0.13%
|style='background: #ffffe6; |0.35%
|-
|[[Multiracial Americans|Mixed race or Multiracial]] (NH)
|10,982
|14,127
|style='background: #ffffe6; |29,571
|1.21%
|1.54%
|style='background: #ffffe6; |3.17%
|-
|[[Hispanic and Latino Americans|Hispanic or Latino]] (any race)
|81,366
|121,506
|style='background: #ffffe6; |144,291
|9.00%
|13.25%
|style='background: #ffffe6; |15.47%
|-
|'''Total'''
|'''904,161'''
|'''916,924'''
|style='background: #ffffe6; |'''932,877'''
|'''100.00%'''
|'''100.00%'''
|style='background: #ffffe6; |'''100.00%'''
|}

=== 2022 American Community Survey ===
The largest European ancestries reported among DuPage County residents in the 2022 [[American Community Survey]] are German (147,639 people or 16% of the population), [[Irish Americans|Irish]] (112,329 people, 12.2%), [[Polish Americans|Polish]] (89,682, 9.7%), [[Italian Americans|Italian]] (82,745, 9%), and [[English Americans|English]] (62,404, 6.8%). The largest Hispanic group in the county is [[Mexican Americans]], numbering 106,907 and making up 11.6% of the county's population, and over 70% of the total Hispanic population. The most common Asian ancestries in the county are [[Indian Americans|Indian]] (59,305, or 6.4% of the total population), [[Filipino Americans|Filipino]] (20,141, 2.2%), [[Chinese Americans|Chinese]] (17,031, 1.8%), and [[Pakistani Americans|Pakistani]] (11,046, 1.2%).<ref>{{Cite web |title=Grid View: Table B04006 - Census Reporter |url=https://censusreporter.org/data/table/?table=B04006&geo_ids=05000US17043&primary_geo_id=05000US17043#valueType%7Cestimate |access-date=2024-06-28 |website=censusreporter.org}}</ref><ref>{{Cite web |title=Grid View: Table B03001 - Census Reporter |url=https://censusreporter.org/data/table/?table=B03001&geo_ids=05000US17043&primary_geo_id=05000US17043#valueType%7Cestimate |access-date=2024-06-28 |website=censusreporter.org}}</ref>

The population of DuPage County has become more diverse. The population of foreign-born residents increased from about 71,300 in 1990 to 184,000 by 2022 estimates.<ref>{{Cite web |title=Grid View: Table B05002 - Census Reporter |url=https://censusreporter.org/data/table/?table=B05002&geo_ids=05000US17043&primary_geo_id=05000US17043#valueType%7Cestimate |access-date=2024-06-29 |website=censusreporter.org}}</ref> Of the 20% of residents who were born abroad, 45.2% were born in [[Asia]], 25.8% were born in [[Latin America]], 24.3% were born in [[Europe]], 3.5% were born in [[Africa]], 3.1% were born in [[South America]], 0.2% were born in [[Oceania]], and 1.1% were born in [[Canada]].<ref>{{Cite web |title=Grid View: Table B05006 - Census Reporter |url=https://censusreporter.org/data/table/?table=B05006&geo_ids=05000US17043&primary_geo_id=05000US17043 |access-date=2024-06-29 |website=censusreporter.org}}</ref> The top countries of birth for immigrants in DuPage County are [[Mexico]] (36,146), [[India]] (35,486), [[Poland]] (14,107), the [[Philippines]] (11,352), and [[China]] (10,116). 

The [[per-capita income]] in DuPage County was $88,588 according to 2022 data from the Bureau of Economic Analysis. This was the second highest of any county in Illinois, surpassed only by that of [[Lake County, Illinois|Lake County]], located north of Chicago.<ref>{{Cite web |date=November 16, 2023 |title=Personal Income by County and Metropolitan Area, 2022 |url=https://www.bea.gov/sites/default/files/2023-11/lapi1123.pdf |website=Bureau of Economic Analysis}}</ref> As of 2022, DuPage County has a poverty rate of 6.7%, much lower than the national and state average.<ref>{{Cite web |title=Census profile: DuPage County, IL |url=http://censusreporter.org/profiles/05000US17043-dupage-county-il/ |access-date=2024-06-29 |website=Census Reporter |language=en}}</ref> 8% of children under 18 and 6% of seniors in the county are in poverty.

=== 2010 Census ===
There were 325,601 households, out of which 37.00% had children under the age of 18 living with them, 60.90% were [[Marriage|married couples]] living together, 7.90% had a female householder with no husband present and 28.00% were non-families. 22.90% of all households were made up of individuals, and 6.80% had someone living alone who was 65 years of age or older. The average household size was 2.73 and the average family size was 3.27.

In the county, 26.70% of the population was under the age of 18, 8.20% was from 18 to 24, 32.40% from 25 to 44, 22.80% from 45 to 64 and 9.80% was 65 years of age or older. The median age was 35 years. For every 100 females, there were 97.20 males. For every 100 females, age 18 and over, there were 94.20 males.

The median income for a household in the county was $98,441 and the median income for a family was $113,086.<ref name="GR2">{{cite web|url=http://factfinder.census.gov/servlet/ACSSAFFFacts?_event=Search&geo_id=05000US13113&_geoContext=01000US%7C04000US13%7C05000US13113&_street=&_county=dupage&_cityTown=dupage&_state=04000US17&_zip=&_lang=en&_sse=on&ActiveGeoDiv=geoSelect&_useEV=&pctxt=fph&pgsl=050&_submenuId=factsheet_1&ds_name=ACS_2007_3YR_SAFF&_ci_nbr=null&qr_name=null&reg=null%3Anull&_keyword=&_industry=|publisher=[[United States Census Bureau]]|access-date=April 2, 2009|title=American FactFinder|url-status=dead|archive-url=https://archive.today/20200211180733/http://factfinder.census.gov/servlet/ACSSAFFFacts?_event=Search&geo_id=05000US13113&_geoContext=01000US%7C04000US13%7C05000US13113&_street=&_county=dupage&_cityTown=dupage&_state=04000US17&_zip=&_lang=en&_sse=on&ActiveGeoDiv=geoSelect&_useEV=&pctxt=fph&pgsl=050&_submenuId=factsheet_1&ds_name=ACS_2007_3YR_SAFF&_ci_nbr=null&qr_name=null&reg=null:null&_keyword=&_industry=|archive-date=February 11, 2020}}</ref> Males had a median income of $60,909 versus $41,346 for females. The mean or average income for a family in DuPage County is $121,009, according to the 2005 census. The [[per capita income]] for the county was $38,458. About 2.40% of families and 3.60% of the population were below the [[poverty threshold|poverty line]], including 3.90% of those under age 18 and 4.30% of those age 65 or over.<ref name="GR2" />

===Religion===
[[File:First Church of Lombard (Lombard, Illinois) 05.JPG|thumb|upright|The [[First Church of Lombard]] is listed on the [[National Register of Historic Places listings in DuPage County, Illinois|National Register of Historic Places]].]]
DuPage County has several hundred Christian churches, and especially around Wheaton is a [[Bible Belt]], with [[Wheaton College (Illinois)|Wheaton College]] and various other evangelical Christian colleges, and publishing houses including [[InterVarsity Press]], [[Good News Publishers|Crossway]], [[Tyndale House]], [[Christianity Today]] and other smaller ones in the area.<ref>{{cite news |last1=Goldsborough |first1=Bob |title=Churches in DuPage on Growth Track|url=https://www.chicagotribune.com/news/ct-xpm-1994-05-04-9405040287-story.html |access-date=October 11, 2021 |work=Chicago Tribune |date=May 4, 1994}}</ref> Notable churches include [[Megachurch|megachurches]] like Community Christian Church in Naperville, [[Wheaton Bible Church]], Christ Church in Oak Brook, and other large congregations like [[College Church]]. There is also a large [[Catholic Church|Catholic]] population, the county being part of the [[Roman Catholic Diocese of Joliet in Illinois|Diocese of Joliet]] and the [[National Shrine of St Therese]] in Darien. There is also the [[Ukrainian Orthodox Church of the USA|Ukrainian Orthodox Church]] in Glendale Heights.

The [[Theosophical Society in America]] in Wheaton, the North American headquarters of the [[Theosophical Society Adyar]], provides lectures and classes on [[Theosophy (Blavatskian)|theosophy]], [[meditation]], [[yoga]], [[Eastern philosophy|Eastern]] and [[New Age]] [[spirituality]]. [[Islam]]ic [[mosque]]s are located in [[Villa Park, Illinois|Villa Park]], Naperville (two mosques), Glendale Heights, Willowbrook, Westmont, Lombard, Bolingbrook, Addison, Woodale, West Chicago, and unincorporated Glen Ellyn.<ref>{{cite web|url=http://www.islamiccenterofnaperville.org/|title=Home|website=islamiccenterofnaperville.org|access-date=May 8, 2018|url-status=live|archive-url=https://web.archive.org/web/20180309012952/http://www.islamiccenterofnaperville.org/|archive-date=March 9, 2018}}</ref> There are [[Hinduism|Hindu]] temples in Bartlett, Bensenville, Bloomingdale, Carol Stream, Itasca and Medinah, and an [[Arya Samaj]] center in West Chicago. There is a [[Nichiren Shōshū]] [[Zen|Zen Buddhist]] temple in [[West Chicago, Illinois|West Chicago]]<ref>{{cite web|url=http://www.encyclopedia.chicagohistory.org/pages/176.html|title=Buddhists|website=www.encyclopedia.chicagohistory.org|access-date=May 8, 2018|url-status=live|archive-url=https://web.archive.org/web/20171021031754/http://www.encyclopedia.chicagohistory.org/pages/176.html|archive-date=October 21, 2017}}</ref> and a [[Theravada]] Buddhist Temple, called the Buddha-Dharma Meditation Center, in [[Willowbrook, DuPage County, Illinois|Willowbrook]].<ref>{{cite web |title=About Us |url=https://sites.google.com/view/wbd/home |publisher=Wat Buddha Dhamma |access-date=October 11, 2021}}</ref> There is also a [[Reform Judaism|Reform synagogue]], Congregation Etz Chaim,<ref>{{cite web |title=About Us |url=https://congetzchaim.org/aboutus/ |publisher=Congregation Etz Chaim |access-date=October 11, 2021}}</ref> in Lombard and an unaffiliated one in Naperville, called Congregation Beth Shalom.<ref>{{cite web |title=About Us |url=https://www.napershalom.org/about-cbs/who-we-are/ |publisher=Congregation Beth Shalom |access-date=October 11, 2021}}</ref>

==Economy==
DuPage County is the primary location of the [[Illinois Technology and Research Corridor]]. It is home to many large corporations, including:
{{Div col}}
* [[Ace Hardware]] ([[Oak Brook, Illinois|Oak Brook]])
* [[Arthur J. Gallagher & Co.]] ([[Itasca, Illinois|Itasca]]) ([[Fortune 1000]])
* [[BP]] (formerly British Petroleum) ([[Warrenville, Illinois|Warrenville]])
* [[DeVry University|DeVry Inc.]] ([[Oakbrook Terrace, Illinois|Oakbrook Terrace]]) ([[New York Stock Exchange|NYSE]])
* [[Dover Corporation]] ([[Downers Grove, Illinois|Downers Grove]]) ([[Fortune 500]])
* [[Eby-Brown]] ([[Naperville, Illinois|Naperville]])
* [[Hub Group]] ([[Oak Brook, Illinois|Oak Brook]]) ([[Fortune 1000]])
* [[Molex]] ([[Lisle, Illinois|Lisle]]) ([[Fortune 1000]])
* [[Nalco Water]] ([[Naperville, Illinois|Naperville]]) ([[Fortune 1000]])
* [[Namco Cybertainment]] ([[Bensenville, Illinois|Bensenville]])
* [[Navistar International]] ([[Lisle, Illinois|Lisle]]) ([[Fortune Global 500]])
* [[Nicor Gas]] ([[Naperville, Illinois|Naperville]]) ([[Fortune 1000]])
* [[OfficeMax]] ([[Naperville, Illinois|Naperville]]) ([[Fortune 500]])
* [[Sara Lee Corporation]] ([[Downers Grove, Illinois|Downers Grove]]) ([[Fortune 500]])
* [[Tellabs]] ([[Naperville, Illinois|Naperville]]) ([[Fortune 1000]])
* [[Ty Warner]] (Beanie Babies) ([[Westmont, Illinois|Westmont]])
{{Div col end}}

Shopping malls in DuPage County include [[Oakbrook Center]], which is the largest open-air mall in the nation, [[Fox Valley Mall]], [[Yorktown Center]], [[Wheaton, Illinois|Town Square Wheaton]], and [[Stratford Square Mall]]. In addition, many of DuPage County's towns have prosperous and quaint downtown areas, especially in [[Naperville, Illinois|Naperville]], [[Glen Ellyn, Illinois|Glen Ellyn]], [[Elmhurst, Illinois|Elmhurst]], [[Wheaton, Illinois|Wheaton]], [[Downers Grove, Illinois|Downers Grove]] and [[Hinsdale, Illinois|Hinsdale]], which are mixed with boutiques, upscale chain stores and restaurants.

===National Laboratories===
[[File:Fermilab.jpg|thumb|Aerial view of the [[Tevatron]] particle accelerator at the [[Fermilab]] site]]

[[Fermilab]], which has the world's second-highest-energy [[particle accelerator]],<ref name="Tevatron">{{cite web|url=http://www.fnal.gov/pub/about/faqs/index.html|title=About Fermilab|date=March 18, 2004|publisher=Fermi National Accelerator Laboratory|access-date=February 19, 2010|url-status=dead|archive-url=https://web.archive.org/web/20100204023252/http://www.fnal.gov/pub/about/faqs/index.html|archive-date=February 4, 2010}}</ref> is in [[Batavia, Illinois|Batavia]], where it straddles the border between Kane and DuPage counties.<ref>{{cite web|url=http://www.dupageco.org/cobrd/generic.cfm?doc_id=1100|title=County Board District 6 map|year=2010|publisher=DuPage County|access-date=February 19, 2010|url-status=dead|archive-url=https://web.archive.org/web/20100612232850/http://dupageco.org/cobrd/generic.cfm?doc_id=1100|archive-date=June 12, 2010}}</ref>

[[Argonne National Laboratory]], one of the United States government's oldest and largest science and engineering research laboratories,<ref>{{cite web|url=http://www.anl.gov/Administration/index.html |title=About Argonne |year=2010 |publisher=Argonne National Laboratory |access-date=February 19, 2010 |url-status=dead |archive-url=https://web.archive.org/web/20110514055504/http://www.anl.gov/Administration/index.html |archive-date=May 14, 2011 }}</ref> is in unincorporated, southeast DuPage County.<ref>{{cite web|url=http://www.dupageco.org/cobrd/generic.cfm?doc_id=1097|title=County Board District 3 map|year=2010|publisher=DuPage County|access-date=February 19, 2010|url-status=dead|archive-url=https://web.archive.org/web/20100612232749/http://dupageco.org/cobrd/generic.cfm?doc_id=1097|archive-date=June 12, 2010}}</ref> Both laboratories conduct tours of their facilities.

==Arts and culture==
===Architecture===
The 31-story Oakbrook Terrace Tower in [[Oakbrook Terrace, Illinois|Oakbrook Terrace]], designed by [[Helmut Jahn]], is the tallest building in Illinois outside of Chicago.<ref>{{cite web|url=http://www.emporis.com/en/wm/bu/?id=126138|title=Oakbrook Terrace Tower, Oakbrook Terrace - 126138 - EMPORIS|first=Emporis|last=GmbH|website=[[Emporis]]|access-date=May 8, 2018|url-status=usurped|archive-url=https://web.archive.org/web/20070930115345/http://www.emporis.com/en/wm/bu/?id=126138|archive-date=September 30, 2007}}</ref> The Elmhurst Art Museum is housed in a [[Ludwig Mies van der Rohe|Mies Van Der Rohe]] building. There is a [[Frank Lloyd Wright]] house in [[Elmhurst, Illinois|Elmhurst]]. [[Bochasanwasi Akshar Purushottam Swaminarayan Sanstha]], a conservative [[Hinduism|Hindu]] [[sect]], has built [[BAPS Shri Swaminarayan Mandir Chicago]], a large, intricately carved, marble temple in [[Bartlett, Illinois|Bartlett]]. There are some [[Sears Catalog Home]]s in [[Downers Grove, Illinois|Downers Grove]] and [[Villa Park, Illinois|Villa Park]]. The [[Byzantine architecture|Byzantine-style]] clubhouse of the [[Medinah Country Club]] is also an architectural highlight of the county. [[Lombard, Illinois|Lombard]] is home to over thirty [[Lustron house|Lustron]] prefabricated steel homes.<ref>{{cite web|url=http://www.piranhagraphix.com/Lustron/Lombard_Lustrons/lombard_lustrons.htm|publisher=Scott Vargo|title=Lombard Lustrons|access-date=October 27, 2007|url-status=live|archive-url=https://web.archive.org/web/20071022133725/http://piranhagraphix.com/Lustron/Lombard_Lustrons/lombard_lustrons.htm|archive-date=October 22, 2007}}</ref>

===Museums and historical sites===
{{See also|National Register of Historic Places listings in DuPage County, Illinois}}
[[File:Graue Mill - Oak Brook, IL.jpg|thumb|right|[[Graue Mill]]]]

Historical museums in DuPage County include:
* [[Cantigny Park]] and First Division Museum, on the former estate of ''[[Chicago Tribune]]'' magnate [[Robert R. McCormick]] ([[Wheaton, Illinois|Wheaton]])
* Downers Grove Museum ([[Downers Grove, Illinois|Downers Grove]])
* [[DuPage County Historical Museum]], formerly the Adams Memorial Library ([[Wheaton, Illinois|Wheaton]])
* [[Graue Mill]] ([[Oak Brook, Illinois|Oak Brook]])
* [[William L. Gregg House|Gregg House Museum]] ([[Westmont, Illinois|Westmont]])
* Itasca Historical Depot Museum ([[Itasca, Illinois|Itasca]])
* [[Kline Creek Farm]] (West Chicago)
* [[Mayslake Peabody Estate]] ([[Oak Brook, Illinois|Oak Brook]])
* The Museums at Lisle Station Park ([[Lisle, Illinois|Lisle]])
* [[Naper Settlement]] ([[Naperville, Illinois|Naperville]])
* [[Villa Avenue station|Villa Park Historical Society Museum]] ([[Villa Park]])
* [[West Chicago City Museum]] ([[West Chicago, Illinois|West Chicago]])

Specialty museums in DuPage County include:
* [[Cleve Carney Museum of Art]] ([[Glen Ellyn, Illinois|Glen Ellyn]])
* DuPage Children's Museum ([[Naperville, Illinois|Naperville]])
* Elmhurst Art Museum, which includes [[Ludwig Mies van der Rohe|Mies Van Der Rohe's]] McCormick House<ref>{{cite web|url=http://www.elmhurstartmuseum.org/mccormick-house.html|title=About the McCormick House|publisher=Elmhurst Art Museum|archive-url=https://web.archive.org/web/20131005000244/http://www.elmhurstartmuseum.org/mccormick-house.html|archive-date=October 5, 2013|url-status=dead|access-date=October 3, 2013}}</ref> ([[Elmhurst, Illinois|Elmhurst]])
* [[Lizzadro Museum of Lapidary Art]] ([[Oak Brook, Illinois|Oak Brook]])
* [[Wheaton College (Illinois)|Wheaton College]] ([[Wheaton, Illinois|Wheaton]])
** [[Billy Graham Center]]
** [[Marion E. Wade Center]]

[[File:Naper's General Store, 216-218 Main Street, Naperville, IL.jpg|thumb|upright|Joe Naper's General Store in Naperville]]
Historical sites include:
* [[Downtown Hinsdale Historic District]]
* [[DuPage County Courthouse]] ([[Wheaton, Illinois|Wheaton]])<ref>{{NRISref|2010a|dateform=mdy |access-date=August 18, 2020|refnum=78003107|name=Du Page County Courthouse}}</ref>
* [[Glen Ellyn Main Street Historic District]]
* Joe Naper's General Store ([[Naperville, Illinois|Naperville]])<ref>{{Cite web|url=https://www.napersettlement.org/DocumentCenter/Home/View/333|title=Layout 1|website=Naper Settlement|access-date=November 8, 2018}}</ref>
* [[Naperville Historic District]]
* [[Old Nichols Library]] ([[Naperville, Illinois|Naperville]])<ref>{{Cite web|url=https://www.naperville.il.us/about-naperville/historic-district/|title=Historic District {{!}} The City of Naperville|website=www.naperville.il.us|language=en|access-date=August 11, 2018}}</ref>
* Pioneer Park, monument to the pioneer men and women of DuPage County and site of Bailey Hobson's mill ([[Naperville, Illinois|Naperville]])<ref>{{Cite web|url=https://katesbriefhistory.blogspot.com/2011/08/pioneers-of-pioneer-park.html|title=A Brief History: The Pioneers of Pioneer Park|date=August 22, 2011|website=A Brief History|access-date=August 11, 2018}}</ref>
* [[Stacy's Tavern]] ([[Glen Ellyn, Illinois|Glen Ellyn]])
* [[Wayne Village Historic District]]

===Music and theater===
DuPage also plays host to a rich local music scene. Some of the better-known bands to come out of the area include [[The Hush Sound]], [[Lucky Boys Confusion]], and [[Plain White T's]].

[[Oakbrook Terrace, Illinois|Oakbrook Terrace's]] [[Drury Lane Theatre (Illinois)|Drury Lane Theatre]] is an important live [[theatre]] in DuPage County. The [[Tivoli Theatre (Downers Grove, Illinois)|Tivoli Theatre]], one of the first theatres in the United States to be equipped with sound, is still in use in Downers Grove.<ref>{{cite book|first1=Max |last1=Grinnell |chapter-url=
http://www.encyclopedia.chicagohistory.org/pages/851.html |chapter=Going to the Movies |title=The Electronic Encyclopedia of Chicago|access-date=October 24, 2023|date=2005|publisher=[[Chicago History Museum|Chicago Historical Society]]}}</ref> In addition to showing movies, the Tivoli is home to several local performing arts groups.<ref>{{cite web|url=http://www.classiccinemas.com/history/tivoli.asp|title=Theatre History: Tivoli Theatre |archive-url=https://web.archive.org/web/20080402132749/http://www.classiccinemas.com/history/tivoli.asp |archive-date=April 2, 2008|access-date=October 24, 2023|publisher=[[Classic Cinemas]]}}</ref> The [[McAninch Arts Center]] located on the Glen Ellyn campus of the College of DuPage also presents a variety of music, dance, theater and comedy year round both on its three indoor stages and its outdoor Lakeside Pavilion.

==Parks and recreation==
{{Main|Forest Preserve District of DuPage County}}
[[File:Morton arboretum.jpg|thumb|[[Morton Arboretum]] in [[Lisle, Illinois|Lisle]]]]
The [[Forest Preserve District of DuPage County]] owns and manages {{convert|25000|acre}} of [[prairie]]s, [[woodland]]s and [[wetland]]s. More than 4 million visitors each year enjoy 60 forest preserves, 145 miles of trails, and five education centers.<ref>{{cite web|title=Forest Preserve District Budget Approved for 2013-2014|url=http://www.dupageforest.org/District_News/News_Releases/2013/Forest_Preserve_District_Budget_Approved_for_2013-2014.aspx|publisher=Forest Preserve District of DuPage County|access-date=October 3, 2013|url-status=dead|archive-url=https://archive.today/20131003222358/http://www.dupageforest.org/District_News/News_Releases/2013/Forest_Preserve_District_Budget_Approved_for_2013-2014.aspx|archive-date=October 3, 2013}}</ref>

Local [[urban park]]s include [[Lombard, Illinois|Lombard]]'s [[Lilacia Park]], [[Naperville, Illinois|Naperville]]'s [[Centennial Beach]], [[Woodridge, Illinois|Woodridge]]'s [[Cypress Cove Family Aquatic Park]] and [[Wheaton, Illinois|Wheaton]]'s [[Cosley Zoo]]. Privately funded attractions include [[Lisle, Illinois|Lisle]]'s [[Morton Arboretum]].

In the 1980s, DuPage County also had another major attraction, [[Ebenezer Floppen Slopper's Wonderful Water slides]] in [[Oakbrook Terrace, Illinois|Oakbrook Terrace]], which today, stands abandoned and neglected.

The [[Illinois Prairie Path]], a {{convert|61|mi|km|adj=on}} [[Rail trail|rail-to-trail]] multi-use path, runs through Cook, DuPage and Kane Counties. It intersects with the [[Great Western Trail (Illinois)|Great Western Trail]] at several points, as well as the [[Fox River Trail (Illinois)|Fox River Trail]] at a few points.

DuPage [[golf course]]s include: Wheaton's [[Chicago Golf Club]], Arrowhead Golf Club and [[Cantigny Park#Golf|Cantigny Golf]] courses; the [[Medinah Country Club]]; the [[Village Links of Glen Ellyn|Village Links]] and [[Glen Oak Country Club]] of [[Glen Ellyn, Illinois|Glen Ellyn]]; Addison's [[Forest Preserve District of DuPage County#Golf|Oak Meadows]]; Oak Brook's Oak Brook Golf Club, [[Butler National Golf Club]], and Butterfield Country Club; Wood Dale's [[Forest Preserve District of DuPage County#Golf|Maple Meadows]]; Westmont's [[Forest Preserve District of DuPage County#Golf|Green Meadows]]; Lisle's River Bend (9 holes); [[West Chicago's St. Andrews Golf & Country Club]] and Winfield's Klein Creek Golf Club, among others.

==Government==
[[File:DuPage_county_court_complex_aerial.jpg|thumb|The DuPage County Courthouse complex in Wheaton]] DuPage County is governed by a County Board whose duties include managing county funds and business, levying taxes, and appropriating funds. The County Board exercises powers not assigned to other elected officials or other boards.<ref>{{cite web|title=County Board Overview|url=http://www.dupageco.org/cobrd/|publisher=DuPage County|access-date=December 29, 2016|url-status=live|archive-url=https://web.archive.org/web/20161229234611/http://www.dupageco.org/cobrd/|archive-date=December 29, 2016}}</ref>

The county is divided into six districts. Each district elects three members to the County Board in staggered two-year and four-year terms. The Chairman of the County Board is the chief executive officer of DuPage County, and is elected countywide every four years.

DuPage County is part of Regional Office of Education #19 which is coterminous with the county's corporate boundaries.<ref>{{cite web|title=Directory July 1, 2020-June 30, 2021|publisher=Illinois Association of Regional Superintendents of Schools|page=6|url=https://iarss.org/wp-content/uploads/2020/10/IARSS-Directory_2020_2021_web-1.pdf|access-date=April 24, 2022|archive-url=https://web.archive.org/web/20201204090557/https://iarss.org/wp-content/uploads/2020/10/IARSS-Directory_2020_2021_web-1.pdf|archive-date=December 4, 2020}}</ref>

As of December 2022, the DuPage County Board is controlled by the Democratic Party by an 11 to 7 margin.<ref name="ctybd22">{{Cite web|url=https://www.dupagecounty.gov/government/county_board/county_board_members/|title=County Board Members|publisher=DuPage County|access-date=April 3, 2024}}</ref>

{| class="wikitable sortable"
|+ style="text-align:center;" | DuPage County Board (as of 2024)<ref name="ctybd22"/>
|-
! District !! Board Member !! Party !! Elected
|- {{Party shading/Democratic}}
|Chairman || Deb Conroy || Democratic || 2022
|- {{Party shading/Republican}}
|1 || Cindy Cronin Cahill || Republican || 2022
|- {{Party shading/Democratic}}
|1 || Michael Childress || Democratic || 2022
|- {{Party shading/Republican}}
|1 || Sam Tornatore || Republican || 2012
|- {{Party shading/Democratic}}
|2 || Elizabeth Chaplin || Democratic || 2012
|- {{Party shading/Democratic}}
|2 || Paula Deacon Garcia || Democratic || 2020
|- {{Party shading/Democratic}}
|2 || Yeena Yoo || Democratic || 2022
|- {{Party shading/Democratic}}
|3 || Lucy Chang Evans || Democratic || 2022
|- {{Party shading/Republican}}
|3 || Kari Galassi || Republican || 2022
|- {{Party shading/Republican}}
|3 || Brian Krajewski || Republican || 2010
|- {{Party shading/Republican}}
|4 || Grant Eckhoff || Republican || 2002
|- {{Party shading/Democratic}}
|4 || Lynn LaPlante || Democratic || 2020
|- {{Party shading/Democratic}}
|4 || Mary FitzGerald Ozog || Democratic || 2018
|- {{Party shading/Democratic}}
|5 || Sadia Covert || Democratic || 2018
|- {{Party shading/Democratic}}
|5 || Dawn DeSart || Democratic || 2018
|- {{Party shading/Republican}}
|5 || Patty Gustin || Republican || 2022
|- {{Party shading/Democratic}}
|6 || Sheila Rutledge || Democratic || 2018
|- {{Party shading/Democratic}}
|6 || Greg Schwarze || Democratic || 2020
|- {{Party shading/Republican}}
|6 || Jim Zay || Republican || 1999
|-
|}

==Politics==
DuPage County was historically a stronghold of the [[Republican Party (United States)|Republican Party]], and a classic bastion of suburban conservatism. In recent years, DuPage County has joined other suburban counties outside large U.S. cities trending [[Democratic Party (United States)|Democratic]] in presidential election years since the 1990s. The county also leans Democratic in state and local politics. In the [[2018 Illinois gubernatorial election]], [[J. B. Pritzker]] became the first Democratic candidate for the governorship to win the county in nearly 100 years. DuPage County voters backed Pritzker in his [[2022 Illinois gubernatorial election|2022 re-election]] bid by a large margin.<ref>{{Cite news |last=Kaufmann |first=Justin |date=November 9, 2022 |title=Democrats win Illinois ... for now |work=Axios |url=https://www.axios.com/local/chicago/2022/11/10/democrats-win-illinois-midterms-2022}}</ref>

=== National politics ===
{{PresHead|place=DuPage County, Illinois|source=<ref>{{cite web|url=http://uselectionatlas.org/RESULTS|title=Dave Leip's Atlas of U.S. Presidential Elections|first=David|last=Leip|website=uselectionatlas.org|access-date=May 8, 2018|url-status=live|archive-url=https://web.archive.org/web/20180323225526/https://uselectionatlas.org/RESULTS/|archive-date=March 23, 2018}}</ref>}}
<!-- PresRow should be {{PresRow|Year|Winning party|GOP vote #|Dem vote #|3rd party vote #|State}} -->
{{PresRow|2024|Democratic|191,243|251,164|18,261|Illinois}}
{{PresRow|2020|Democratic|193,611|281,222|12,930|Illinois}}
{{PresRow|2016|Democratic|166,415|228,622|35,637|Illinois}}
{{PresRow|2012|Democratic|195,046|199,460|6,575|Illinois}}
{{PresRow|2008|Democratic|183,626|228,698|5,649|Illinois}}
{{PresRow|2004|Republican|218,902|180,097|3,447|Illinois}}
{{PresRow|2000|Republican|201,037|152,550|10,775|Illinois}}
{{PresRow|1996|Republican|164,630|129,709|30,147|Illinois}}
{{PresRow|1992|Republican|178,271|114,564|78,152|Illinois}}
{{PresRow|1988|Republican|217,907|94,285|1,862|Illinois}}
{{PresRow|1984|Republican|227,141|71,430|1,644|Illinois}}
{{PresRow|1980|Republican|182,308|68,991|33,450|Illinois}}
{{PresRow|1976|Republican|175,055|72,137|7,355|Illinois}}
{{PresRow|1972|Republican|172,341|57,043|355|Illinois}}
{{PresRow|1968|Republican|124,893|48,492|14,111|Illinois}}
{{PresRow|1964|Republican|98,871|66,229|0|Illinois}}
{{PresRow|1960|Republican|101,014|44,263|168|Illinois}}
{{PresRow|1956|Republican|91,834|23,103|207|Illinois}}
{{PresRow|1952|Republican|71,134|22,489|217|Illinois}}
{{PresRow|1948|Republican|45,794|15,528|916|Illinois}}
{{PresRow|1944|Republican|41,890|18,711|174|Illinois}}
{{PresRow|1940|Republican|40,746|18,923|380|Illinois}}
{{PresRow|1936|Republican|28,380|21,684|1,568|Illinois}}
{{PresRow|1932|Republican|25,758|18,547|1,504|Illinois}}
{{PresRow|1928|Republican|28,016|10,479|217|Illinois}}
{{PresRow|1924|Republican|16,917|1,893|4,423|Illinois}}
{{PresRow|1920|Republican|12,280|2,084|612|Illinois}}
{{PresRow|1916|Republican|9,610|4,816|868|Illinois}}
{{PresRow|1912|Progressive|1,136|2,236|4,589|Illinois}}
{{PresRow|1908|Republican|4,530|1,975|575|Illinois}}
{{PresRow|1904|Republican|4,078|1,407|506|Illinois}}
{{PresRow|1900|Republican|3,869|1,947|237|Illinois}}
{{PresRow|1896|Republican|4,115|1,588|268|Illinois}}
{{PresFoot|1892|Republican|2,478|2,154|290|Illinois}}

The county supported [[Barack Obama]], a Chicago resident, in 2008 and 2012 (albeit narrowly in 2012). Obama was the first Democratic presidential nominee to win the county since [[Franklin Pierce]] in [[1852 United States presidential election|1852]]. The only time prior to 2008 that a Republican had failed to win the county was in 1912, when the GOP was mortally divided and former president and [[Progressive Party (United States, 1912)|Progressive Party]] nominee [[Theodore Roosevelt]] won over half the county's vote.

DuPage County has historically been a fiscally and socially conservative Republican stronghold, though in recent years has become more politically liberal especially on issues of race and immigration.<ref>{{cite web|url=https://abc7chicago.com/blm-black-lives-matter-chicago-what-is-movement/6253776/|title=White mothers in Wheaton come together to design Black Lives Matter signs|date=June 18, 2020|access-date=June 28, 2020}}</ref><ref>{{cite web|url=https://www.dailyherald.com/news/20180115/roskam-on-immigration-we-want-those-very-people-among-us|title=Roskam on immigration: 'We want those very people among us'|date=January 15, 2018|access-date=June 28, 2020}}</ref> DuPage County has been shifting more Democratic, with [[Joe Biden]] winning nearly 58% of the vote in 2020. DuPage County has not voted for a Republican candidate for president since 2004. [[Donald Trump]] was the first Republican nominee for president since 1912 to get less than 40% of the DuPage County vote, both in the 2016 and 2020 general elections. Many DuPage County communities which normally vote Republican, including but not limited to [[Naperville, Illinois|Naperville]], [[Lisle, Illinois|Lisle]], [[Wheaton, Illinois|Wheaton]], [[Glen Ellyn, Illinois|Glen Ellyn]], [[Carol Stream, Illinois|Carol Stream]], [[Downers Grove, Illinois|Downers Grove]], and [[Elmhurst, Illinois|Elmhurst]] did not support Donald Trump in 2016.<ref>{{cite web|url=https://www.dailyherald.com/news/20161230/mapping-the-suburban-vote-for-trump-clinton|title=Mapping the suburban vote for Trump, Clinton|date=December 30, 2016|access-date=April 12, 2020}}</ref> In December 2019, shortly after the U.S. House of Representatives [[First impeachment of Donald Trump|voted to impeach Donald Trump]], [[Carol Stream, Illinois|Carol Stream]]-based ''[[Christianity Today]]'' published a controversial editorial calling for the removal of Trump from office, citing the need to hold him to the same standards to which they held [[Bill Clinton]] in the 1990s (who was the last Democratic nominee for president to get less than 40% of the DuPage County vote).<ref>{{cite web|url=https://www.christianitytoday.com/ct/2019/december-web-only/trump-should-be-removed-from-office.html|title=Trump Should Be Removed from Office|date=December 19, 2019 |access-date=April 12, 2020}}</ref>

In the [[United States House of Representatives|U.S. House of Representatives]], DuPage County is in the [[Illinois's 5th congressional district|5th]], [[Illinois's 6th congressional district|6th]], [[Illinois's 8th congressional district|8th]], [[Illinois's 11th congressional district|11th]] and [[Illinois's 14th congressional district|14th]] districts. In the 2018 general election, despite the county's historical Republican dominance, Democrats won every congressional district within the county.<ref name="Blue Wave 2018"/>

=== Local politics ===
Republicans historically controlled local politics in DuPage County from the nineteenth century until modern times. During the twentieth century, Democrats only held countywide office twice. In 1934 William Robinson was elected Circuit Clerk and Arthur Hellyer was elected Treasurer. That year also saw the first ever Democratic majority county board and only such majority that century.<ref>{{cite news|title=Democrats Hold Jubilee as New Officials Go In|newspaper=[[Chicago Tribune]]|date=December 4, 1934|id={{ProQuest|181618400}}}}</ref><ref>{{cite news|url=https://www.newspapers.com/newspage/37232613/|title=Democrats Win Two DuPage Offices|newspaper=[[Daily Herald (Arlington Heights, Illinois)|Daily Herald]]|page=15|date=November 9, 1934|access-date=April 17, 2017|url-status=live|archive-url=https://web.archive.org/web/20170419002658/https://www.newspapers.com/newspage/37232613/|archive-date=April 19, 2017}}</ref> Robinson and Hellyer each served one term; Robinson lost his bid for a full term in 1936 and Hellyer left the Treasurer's office to make a failed bid for probate judge in 1938.<ref>{{cite news|title=G.O.P. Banners Wave Over Five Nearby Counties: Democratic Office Holders Ousted by Voters|date=November 9, 1938|newspaper=[[Chicago Tribune]]}}</ref> In 2018, as part of a larger suburban realignment, Democratic candidate Jean Kaczmarek won the election for County Clerk and Daniel Hebreard won the President of the Forest Preserve District of DuPage County.<ref name="Blue Wave 2018"/><ref>{{cite news|last=Miller|first=Rich|title=The Democrats' vote-by-mail juggernaut|date=November 20, 2018|newspaper=[[Capitol Fax]]|access-date=November 21, 2018|url=https://capitolfax.com/2018/11/20/the-democrats-vote-by-mail-juggernaut/}}</ref><ref>The Forest Preserve District of DuPage County is a countywide special district coterminous with DuPage County, Illinois</ref>

During that same period Democrats were sporadically elected to the county board and township government. In 1972, Don Carroll was elected to the County Board. In the Democratic wave of 1974, Jane Spirgel, Mary Eleanor Wall, and Elaine Libovicz were elected. All four were from the northeastern portion of DuPage, which at that time was the most Democratic region of the county.<ref>{{cite news|last1=Sherlock|first1=Barbara|last2=Shallwani|first2=Pervaiz|title=DuPage Democrats hope board exile short-lived|newspaper=[[Chicago Tribune]]|date=November 8, 2002|location=[[Chicago, Illinois]]}}</ref> Eventually, Republicans regained all seats on the board when Jane Spirgel ran for [[Illinois Secretary of State]] with [[Adlai Stevenson III]] under the [[Illinois Solidarity Party|Solidarity Party]] banner.<ref>{{cite news|last=Schmeltzer|first=John|title=Spirgel one of a kind in Du Page|newspaper=[[Chicago Tribune]]|date=May 6, 1986|location=[[Chicago, Illinois]]}}</ref> In 2000, Linda J. Bourke Hilbert was elected. Like her 1970s counterparts, she was from the northeastern portion of the county.<ref>{{cite news|last=Trebe|first=Patricia|title=Linda J. Bourke Hilbert, 63; DuPage County Board's 1st Democrat since '80s|newspaper=[[Chicago Tribune]]|date=May 6, 1986|location=[[Chicago, Illinois]]}}</ref> During the 2008 Democratic wave, three Democrats were elected to the board.<ref>{{cite news|last=Napolitano|first=Jo|title=Democrats gaining a foothold|newspaper=[[Chicago Tribune]]|location=[[Chicago, Illinois]]|date=November 5, 2008}}</ref> After the initial Obama wave, Republicans reasserted themselves on the board and by 2017 Democrats held only one of the eighteen board seats. In the 2018 general election, Democrats won seven seats as well as the offices of County Clerk and Forest Preserve District President.<ref name="Blue Wave 2018">{{cite news|last=Rakow|first=Bob|title=Blue Wave hits DuPage County|date=November 14, 2018|newspaper=My Suburban Life|access-date=November 21, 2018|url=https://www.mysuburbanlife.com/2018/11/13/blue-wave-hits-dupage-county/a58dpra/}}</ref>

In 1973, a slate of Democrats took eight of nine offices in [[Addison Township, DuPage County, Illinois|Addison Township]]. This feat would not be replicated until 2017 when Democratic candidates won a majority of offices in [[Naperville Township, DuPage County, Illinois|Naperville]] and [[Lisle Township, DuPage County, Illinois|Lisle]] townships.<ref>{{cite web|last=Erin|first=Hegarty|title=Dems unseat several incumbents in Naperville, Lisle township races|newspaper=[[Chicago Tribune]]|location=[[Chicago, Illinois]]|date=April 5, 2017|access-date=April 17, 2017|url=http://www.chicagotribune.com/suburbs/naperville-sun/news/ct-nvs-naperville-lisle-township-democrats-election-st-0407-20170405-story.html|url-status=live|archive-url=https://web.archive.org/web/20170416130331/http://www.chicagotribune.com/suburbs/naperville-sun/news/ct-nvs-naperville-lisle-township-democrats-election-st-0407-20170405-story.html|archive-date=April 16, 2017}}</ref> Between these two victories, Democrats only held two township offices. Mark Starkovich served as [[York Township, DuPage County, Illinois|York Township Supervisor]] from 1989 to 1993 and Martin McManamon has served as [[Wayne Township, DuPage County, Illinois|Wayne Township Highway Commissioner]] since 2013.<ref>{{cite news|last=Young|first=Linda|title=Democrats lose toehold and confidence in future|newspaper=[[Chicago Tribune]]|date=April 22, 1993|location=[[Chicago, Illinois]]}}</ref>

In 2020, Democrats won control of the DuPage County Board, expanding on their 2018 lead.<ref>{{cite news |last1=Horstead |first1=Megann |title=DuPage County Board Democrats ride blue wave in election |url=https://www.mysuburbanlife.com/2020/11/11/dupage-county-board-democrats-ride-blue-wave-in-election/a9q08ay/ |access-date=January 19, 2022 |work=MySuburbanLife.com |date=November 11, 2020 |archive-url=https://web.archive.org/web/20201113042444/https://www.mysuburbanlife.com/2020/11/11/dupage-county-board-democrats-ride-blue-wave-in-election/a9q08ay/ |archive-date=November 13, 2020}}</ref> In 2022, Democrats expanded their majority in the County Board to 11 seats out of 18.<ref>{{Cite web |date=November 9, 2022 |title=Democrats Poised To Hold DuPage County Board |url=https://patch.com/illinois/elmhurst/democrats-poised-hold-dupage-county-board |access-date=September 11, 2023 |website=Elmhurst, IL Patch |language=en}}</ref> Concurrently, Democrat [[Deb Conroy]] was elected as the chairman of the County Board.<ref>{{Cite web |date=November 10, 2022 |title=Illinois State Rep. Deb Conroy makes history as 1st woman elected DuPage County Board chairman |url=https://abc7chicago.com/deb-conroy-dupage-county-board-greg-hart/12435304/ |access-date=September 11, 2023 |website=ABC7 Chicago |language=en}}</ref>

==Education==
===Colleges and universities===
[[File:Blanchard Hall Wheaton College.jpg|thumb|[[Blanchard Hall]] at [[Wheaton College (Illinois)|Wheaton College]] is listed on the [[National Register of Historic Places listings in DuPage County, Illinois|National Register of Historic Places]].]]
The [[College of DuPage]], in [[Glen Ellyn, Illinois|Glen Ellyn]], is one of the largest [[community college]]s in the United States. [[Wheaton College (Illinois)|Wheaton College]] is one of the most well-known and respected [[evangelicalism|evangelical Christian]] colleges in the country. [[Benedictine University]], [[Elmhurst University]] and [[North Central College]] also have long and respected histories in their communities.

Other prominent [[college]]s and [[University|universities]] include: [[Midwestern University]] and the [[Chicago College of Osteopathic Medicine]] in [[Downers Grove, Illinois|Downers Grove]]; [[National University of Health Sciences]] in [[Lombard, Illinois|Lombard]]; [[Northern Seminary]] and [[National Louis University]] in [[Lisle, Illinois|Lisle]]; the [[Addison, Illinois|Addison]] and [[Naperville, Illinois|Naperville]] campuses of [[DeVry University]]; the Naperville campus of [[Northern Illinois University]]; and the [[Wheaton, Illinois|Wheaton]] campus of [[Illinois Institute of Technology]].

===School districts===
The DuPage County [[Regional office of education|Regional Office of Education]] provides regulatory and compliance oversight, quality services and support, and a variety of other services and information to the public schools within 42 school districts of the county that provide education to over 161,000 students in 245 schools.<ref>{{cite web|title=2008-2009 Annual Report|url=http://www.dupage.k12.il.us/pdf/2009%20Annual%20Report%20Final.pdf|publisher=DuPage Regional Office of Education|access-date=October 18, 2010|url-status=dead|archive-url=https://web.archive.org/web/20101009114938/http://www.dupage.k12.il.us/pdf/2009%20Annual%20Report%20Final.pdf|archive-date=October 9, 2010}}</ref>

The following is a list of school districts that not only includes those supported by the DuPage County Regional Office of Education, but includes others which may have schools and/or administrative headquarters outside of DuPage County but which have any territory, no matter how slight, within the county:<ref>{{cite web|url=https://www2.census.gov/geo/maps/DC2020/PL20/st17_il/schooldistrict_maps/c17043_dupage/DC20SD_C17043.pdf |archive-url=https://web.archive.org/web/20210707005618/https://www2.census.gov/geo/maps/DC2020/PL20/st17_il/schooldistrict_maps/c17043_dupage/DC20SD_C17043.pdf |archive-date=July 7, 2021 |url-status=live|title=2020 CENSUS - SCHOOL DISTRICT REFERENCE MAP: DuPage County, IL|publisher=[[U.S. Cenus Bureau]]|access-date=July 20, 2022}} - [https://www2.census.gov/geo/maps/DC2020/PL20/st17_il/schooldistrict_maps/c17043_dupage/DC20SD_C17043_SD2MS.txt Text list]</ref>

K-12:
* [[Chicago Public School District 299]] - Territory at [[Chicago O'Hare International Airport]] in DuPage County boundaries
* [[Community Unit School District 200 (DuPage County, Illinois)|Community Unit School District 200]]
* [[Elmhurst School District 205]]
* [[Indian Prairie School District 204]]
* [[Lisle Community Unit School District 202]]
* [[Naperville Community Unit District 203]]
* [[School District U-46]]
* [[St. Charles Community Unit School District 303]]
* [[Westmont Community Unit School District 201]]

Secondary:
* [[Community High School District 94]]
* [[Community High School District 99]]
* [[DuPage High School District 88]]
* [[Fenton Community High School District 100]]
* [[Glenbard Township High School District 87]]
* [[Hinsdale Township High School District 86]]
* [[Lake Park Community High School District 108]]
* [[Lemont Township High School District 210]]

Elementary:
* [[Addison School District 4]]
* [[Benjamin School District 25]]
* [[Bensenville School District 2]]
* [[Bloomingdale School District 13]]
* [[Butler School District 53]]
* [[Cass School District 63]]
* [[Center Cass School District 66]]
* [[Community Consolidated School District 93]]
* [[Community Consolidated School District 180]]
* [[Darien School District 61]]
* [[Downers Grove Grade School District 58]]
* [[Glen Ellyn Community Consolidated School District 89]]
* [[Glen Ellyn School District 41]]
* [[Gower School District 62]]
* [[Hinsdale Community Consolidated School District 181]]
* [[Itasca School District 10]]
* [[Keeneyville School District 20]]
* [[Lemont-Bromberek Combined School District 113A]]
* [[Lombard School District 44]]
* [[Maercker School District 60]]
* [[Marquardt School District 15]]
* [[Medinah School District 11]]
* [[Queen Bee School District 16]]
* [[Roselle School District 12]]
* [[Salt Creek School District 48]]
* [[Villa Park School District 45]]
* [[West Chicago School District 33]]
* [[Winfield School District 34]]
* [[Wood Dale School District 7]]
* [[Woodridge School District 68]]

===High schools===
DuPage County is home to many [[public high school]]s, such as:
{{clear left}}
{{div col|colwidth=20em}}
* [[Addison Trail High School]]
* [[Bartlett High School (Illinois)|Bartlett High School]]
* [[Downers Grove North High School]]
* [[Downers Grove South High School]]
* [[Fenton High School (Illinois)|Fenton High School]]
* [[Glenbard East High School]]
* [[Glenbard North High School]]
* [[Glenbard South High School]]
* [[Glenbard West High School]]
* [[Hinsdale Central High School]]
* [[Hinsdale South High School]]
* [[Lake Park High School]]
* [[Lisle High School]]
* [[Metea Valley High School]]
* [[Naperville North High School]]
* [[Naperville Central High School]]
* [[Waubonsie Valley High School]]
* [[Community High School (West Chicago)|West Chicago Community High School]]
* [[Westmont High School (Westmont, Illinois)|Westmont High School]]
* [[Wheaton North High School]]
* [[Wheaton Warrenville South High School]]
* [[Willowbrook High School]]
* [[York Community High School]]
{{div col end}}

DuPage County is home to several [[Private school|private]] [[High school (North America)|high schools]], including:
{{Div col}}
* [[Benet Academy]]
* [[Clapham School]]<ref>{{cite web |title=About Us |location=Wheaton, Illinois|url=https://www.claphamschool.org/about |publisher=Clapham School |access-date=January 4, 2022}}</ref>
* [[College Preparatory School of America]]<ref>{{cite web|title=About CPSA|url=https://cpsaonline.org/about/|publisher=College Preparatory School of America|location=Lombard, Illinois|access-date=January 4, 2022}}</ref>
* [[Driscoll Catholic High School]] (closed 2009)
* [[IC Catholic Prep (Elmhurst, Illinois)|IC Catholic Prep]]
* [[Islamic Foundation School]]
* [[Montini Catholic High School]]
* [[St. Francis High School (Wheaton, Illinois)|St. Francis High School]]
* [[Timothy Christian School (Illinois)|Timothy Christian School]]
* [[Wheaton Academy]]
{{Div col end}}

==Healthcare==
DuPage hospitals include: [[Central DuPage Hospital]] in Winfield; [[Edward Hospital]] in Naperville; Elmhurst Memorial Hospital in Elmhurst; Adventist Hinsdale Hospital in Hinsdale; [[Advocate Good Samaritan Hospital]] in Downers Grove; Adventist GlenOaks Hospital in Glendale Heights; and [[Marianjoy Rehabilitation Hospital]] in Wheaton.

==Transportation==
{{main list|List of county roads in DuPage County, Illinois}}

===Airports===
A small portion of [[O'Hare International Airport]] is located inside the county, as are several small airports, including [[DuPage Airport]]. 

===Public transit===
==== Regional Transit Authority ====
DuPage is served by a number of modes of public transit overseen by the [[Regional Transportation Authority (Illinois)|Regional Transportation Authority]]. [[Pace (transit)|Pace]] operates the bus system within the county. DuPage County is also well-covered by [[Metra]], the Chicago-area commuter rail system. Three of Metra's eleven lines pass through the county: [[Milwaukee District West Line]], [[Union Pacific West Line]], and [[BNSF Line]]. Nineteen Metra stations are located within DuPage County. 

Extending the [[O'Hare, Chicago|O'Hare]] terminus of the [[Chicago "L"]]'s [[Blue Line (CTA)| Blue Line]] westward to [[Schaumburg, Illinois|Schaumburg]] has been a topic of discussion for years.<ref>{{cite news |last1=Nitkin |first1=Alex |title=The CTA Has Interesting Ideas For a Blue Line Extension Sitting on the Shelf |url=https://www.chicagomag.com/city-life/march-2018/the-cta-has-interesting-ideas-for-a-blue-line-extension-sitting-on-the-shelf/ |access-date=1 April 2025 |publisher=Chicago Magazine |date=March 23, 2018}}</ref> After planning for the [[Suburban Transit Access Route (Metra)|Metra STAR Line]] nixed the initial route which went exclusively through Cook County, an option that would include two stations in DuPage County ([[Bensenville, Illinois|Bensenville]]/ [[Wood Dale, Illinois| Wood Dale]], as well as [[Itasca, Illinois|Itasca]]) became the preferred alternative.<ref>{{cite news |last1=Nitkin |first1=Alex |title=The CTA Has Interesting Ideas For a Blue Line Extension Sitting on the Shelf |url=https://www.chicagomag.com/city-life/march-2018/the-cta-has-interesting-ideas-for-a-blue-line-extension-sitting-on-the-shelf/ |access-date=1 April 2025 |publisher=Chicago Magazine |date=March 23, 2018}}</ref> After resistance from [[Chicago Mayor]] [[Richard M. Daley]], this plan failed to come to fruition.<ref>{{cite news |last1=Nitkin |first1=Alex |title=The CTA Has Interesting Ideas For a Blue Line Extension Sitting on the Shelf |url=https://www.chicagomag.com/city-life/march-2018/the-cta-has-interesting-ideas-for-a-blue-line-extension-sitting-on-the-shelf/ |access-date=1 April 2025 |publisher=Chicago Magazine |date=March 23, 2018}}</ref>

In 2008, the [[Regional Transportation Authority (Illinois)|Regional Transit Authority]] included an {{convert|13.3|mi|km|adj=on}} extension of a different branch of the Blue Line, from its current western terminus at Forest Park to [[Yorktown Center]] in [[Lombard, Illinois]]. Several feeder bus services would also be implemented in this plan. The prospect of this extension was also listed in the Chicago region's 2030 master plan.<ref>{{cite news | url=http://www.chicagotribune.com/news/local/chi-corridor_22feb22,0,3797698.story | title=Cook-DuPage corridor project would extend Blue Line |newspaper=Chicago Tribune| access-date=2008-03-04 | archive-url=https://web.archive.org/web/20080226021531/http://www.chicagotribune.com/news/local/chi-corridor_22feb22,0,3797698.story | archive-date=2008-02-26 | url-status=dead }}</ref>

====Amtrak====
[[Amtrak]] also serves the county at [[Naperville station]]. The [[Illinois Zephyr]] and [[Carl Sandburg (train)|Carl Sandburg]] run from Chicago to [[Quincy, Illinois|Quincy]], the [[Southwest Chief]] from Chicago to Los Angeles, and the [[California Zephyr]] runs from Chicago to [[Emeryville, California]].

===Major highways===
DuPage County is served by five [[Interstate Highways]], three [[US Highways]], and nine [[Illinois Routes]].

{{Div col}}
* {{jct|state=IL|I|55}}
* {{jct|state=IL|I|88}}
* {{jct|state=IL|I|290}}
* {{jct|state=IL|I|294}}
* {{jct|state=IL|I|355}}
* {{jct|state=IL|US|20}}
* {{jct|state=IL|US|34}}
* {{jct|state=IL|IL|19}}
* {{jct|state=IL|IL|38}}
* {{jct|state=IL|IL|53}}
* {{jct|state=IL|IL|56}}
* {{jct|state=IL|IL|59}}
* {{jct|state=IL|IL|64}}
* {{jct|state=IL|IL|83}}
* {{jct|state=IL|IL|110}}
* {{jct|state=IL|IL|390}}
* [[File:DuPage County 11.svg|25px]] [[Army Trail Road]]
* [[File:DuPage County 29.svg|25px]] [[Stearns Road (Chicago)|Stearns Road]]
* [[File:DuPage_County_33.svg|25px]] 75th Street
{{div col end}}

North–south roads (from west to east) include: IL 59 (Neltnor Boulevard), IL 53, I-355 (Veterans Memorial Tollway) and IL 83 (Kingery Highway). East–west roads (from south to north) include: I-55 (Stevenson Expressway) I-88 (Ronald Reagan Memorial Tollway), US 34 (Ogden Avenue), IL 56 (Butterfield Road), IL 38 (Roosevelt Road), IL 64 (North Avenue), [[Army Trail Road]], US 20 (Lake Street), IL 19 (Irving Park Road) and IL 390 (Elgin–O'Hare Expressway), which begins at the Thorndale Avenue exit on [[Interstate 290 (Illinois)|I-290]] and ends on Lake Street, in Hanover Park. [[Interstate 294|I-294]] partially enters DuPage County on its eastern border between [[Westchester, Illinois|Westchester]], in Cook County, and [[Oak Brook, Illinois|Oak Brook]], in DuPage County. Only the southbound lanes enter the county though. Historic [[U.S. Route 66 in Illinois|U.S. Route 66]] crosses through the southeast portion of the county near Darien and Willowbrook.<ref>{{cite web |title=Route 66 Road Trip in DuPage County, Illinois |url=https://www.visittheusa.com/experience/combining-culture-and-fun-route-66-dupage-county |publisher=Brand USA |access-date=January 19, 2022}}</ref>

===Shared-use trails===
*[[Illinois Prairie Path]]
*[[Grand Illinois Trail]]
*[[Great Western Trail (Illinois)|Great Western Trail]]
*[[Salt Creek Trail]]

==Communities==
===Cities===
{{Div col|colwidth=15em}}
* [[Aurora, Illinois|Aurora]] (part)
* [[Batavia, Illinois|Batavia]] (part)
* [[Chicago]] (O'Hare Airport)
* [[Darien, Illinois|Darien]]
* [[Elmhurst, Illinois|Elmhurst]] (mostly)
* [[Naperville, Illinois|Naperville]] (mostly)
* [[Oakbrook Terrace, Illinois|Oakbrook Terrace]]
* [[St. Charles, Illinois|St. Charles]] (part)
* [[Warrenville, Illinois|Warrenville]]
* [[West Chicago, Illinois|West Chicago]]
* [[Wheaton, Illinois|Wheaton]]
* [[Wood Dale, Illinois|Wood Dale]]
{{div col end}}

===Villages===
{{Div col|colwidth=15em}}
* [[Addison, Illinois|Addison]]
* [[Bartlett, Illinois|Bartlett]] (mostly)
* [[Bensenville, Illinois|Bensenville]] (mostly)
* [[Bloomingdale, Illinois|Bloomingdale]]
* [[Bolingbrook, Illinois|Bolingbrook]] (part)
* [[Burr Ridge, Illinois|Burr Ridge]] (part)
* [[Carol Stream, Illinois|Carol Stream]]
* [[Clarendon Hills, Illinois|Clarendon Hills]]
* [[Downers Grove, Illinois|Downers Grove]]
* [[Elk Grove Village, Illinois|Elk Grove Village]] (part)
* [[Glendale Heights, Illinois|Glendale Heights]]
* [[Glen Ellyn, Illinois|Glen Ellyn]]
* [[Hanover Park, Illinois|Hanover Park]] (part)
* [[Hinsdale, Illinois|Hinsdale]] (mostly)
* [[Itasca, Illinois|Itasca]]
* [[Lemont, Illinois|Lemont]] (part)
* [[Lisle, Illinois|Lisle]]
* [[Lombard, Illinois|Lombard]]
* [[Oak Brook, Illinois|Oak Brook]] (mostly)
* [[Roselle, Illinois|Roselle]] (mostly)
* [[Schaumburg, Illinois|Schaumburg]] (part)
* [[Villa Park, Illinois|Villa Park]]
* [[Wayne, Illinois|Wayne]] (part)
* [[Westmont, Illinois|Westmont]]
* [[Willow Springs, Illinois|Willow Springs]] (part)
* [[Willowbrook, DuPage County, Illinois|Willowbrook]]
* [[Winfield, Illinois|Winfield]]
* [[Woodridge, Illinois|Woodridge]] (mostly)
{{div col end}}

===Unincorporated communities===
{{Div col|colwidth=15em}}
* [[Belmont, Illinois|Belmont]]
* [[Butterfield, Illinois|Butterfield]]
* [[Cloverdale, Illinois|Cloverdale]]
* [[Eola, Illinois|Eola]]
* [[Flowerfield, Illinois|Flowerfield]]
* [[Fullersburg, Illinois|Fullersburg]] 
* [[Keeneyville, Illinois|Keeneyville]]
* [[Lakewood, DuPage County, Illinois|Lakewood]]
* [[Medinah, Illinois|Medinah]]
* [[Munger, DuPage County, Illinois|Munger]]
* [[North Glen Ellyn, Illinois|North Glen Ellyn]]
* [[Palisades, Illinois|Palisades]]
* [[South Elmhurst, Illinois|South Elmhurst]]
* [[Swift, Illinois|Swift]]
* [[York Center, Illinois|York Center]]
{{div col end}}

===Townships===
DuPage County has nine townships as well as part of an independent city within its boundaries, their populations at the 2010 census are:
{{Div col|colwidth=15em}}
* [[Downers Grove Township, DuPage County, Illinois|Downers Grove Township]] - 146,795
* [[York Township, DuPage County, Illinois|York Township]] - 123,449
* [[Milton Township, DuPage County, Illinois|Milton Township]] - 117,067
* [[Lisle Township, DuPage County, Illinois|Lisle Township]] - 116,268
* [[Bloomingdale Township, DuPage County, Illinois|Bloomingdale Township]] - 111,899
* [[Naperville Township, DuPage County, Illinois|Naperville Township]] - 100,019
* [[Addison Township, DuPage County, Illinois|Addison Township]] - 88,612
* [[Wayne Township, DuPage County, Illinois|Wayne Township]] - 66,582 
* [[Winfield Township, DuPage County, Illinois|Winfield Township]] - 46,233
* [[Chicago, Illinois|City of Chicago]] - DuPage side is nonresidential
{{div col end}}

===Ghost towns/Neighborhoods===
{{div col}}
* [[Gostyn, Illinois|Gostyn]]
* [[Ontarioville, Illinois|Ontarioville]]
* [[Tedens, Illinois|Tedens]]
* [[Weston, DuPage County, Illinois|Weston]]
{{div col end}}

==See also==
{{Portal|Chicago|Illinois}}
* [[List of counties in Illinois]]
* [[List of Illinois townships]]
{{clear right}}

==Notes==
{{notelist}}

==References==
{{Reflist}}

==External links==
{{Commons category}}
* {{Official website}}
* [http://www.encyclopedia.chicagohistory.org/pages/396.html DuPage County at ''Encyclopedia of Chicago'' (2005)] 
* [https://www.discoverdupage.com/ DuPage Convention & Visitors Bureau]

{{Geographic Location
|Centre    = DuPage County, Illinois
|North     = [[Cook County, Illinois|Cook County]]
|Northeast = [[Cook County, Illinois|Cook County]]
|East      = [[Cook County, Illinois|Cook County]]
|Southeast = [[Cook County, Illinois|Cook County]] and [[Will County, Illinois|Will County]]
|South     = [[Will County, Illinois|Will County]]
|Southwest = [[Kendall County, Illinois|Kendall County]]
|West      = [[Kane County, Illinois|Kane County]]
|Northwest = [[Kane County, Illinois|Kane County]]
}}
{{DuPage County, Illinois}}
{{Chicagoland}}
{{Illinois}}
{{Authority control}}

{{DEFAULTSORT:Dupage County, Illinois}}
[[Category:DuPage County, Illinois| ]]
[[Category:1839 establishments in Illinois]]
[[Category:Chicago metropolitan area]]
[[Category:Illinois counties]]
[[Category:Populated places established in 1839]]