Editing Delaware County, Iowa

{{short description|County in Iowa, United States}}
{{Use mdy dates|date=April 2024}}
{{Use American English|date=December 2022}}
{{Infobox U.S. county
 | county               = Delaware County
 | state                = Iowa
 | ex image             = Delaware County Courthouse.jpg
 | ex image size        = 240px
 | ex image cap         = [[Delaware County Courthouse (Iowa)|Delaware County Courthouse]]
 | seal                 = 
 | founded year         = 1837
 | founded date         = 
 | seat wl              = Manchester
 | largest city wl      = Manchester
 | area_total_sq_mi     = 579
 | area_land_sq_mi      = 578
 | area_water_sq_mi     = 1.2
 | area percentage      = 0.2
 | population_as_of     = 2020
 | population_total     = 17488
 | population_density_sq_mi = auto
 | time zone            = Central
 | footnotes            = 
 | web                  = https://delawarecounty.iowa.gov/
 | district             = 2nd
 | named for            = State of [[Delaware]]
}}

'''Delaware County''' is a [[County (United States)|county]] located in the [[U.S. state]] of [[Iowa]]. As of the [[2020 United States census|2020 census]], the population was 17,488.<ref name=cen2020>{{cite web |title=2020 Census State Redistricting Data |url=https://www2.census.gov/programs-surveys/decennial/2020/data/01-Redistricting_File--PL_94-171/Iowa/ |website=census.gov |publisher=United states Census Bureau |access-date=August 12, 2021}}</ref> The [[county seat]] is [[Manchester, Iowa|Manchester]].<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> The county takes its name after the U.S. state of [[Delaware]].

==Geography==
[[File:The Tony Dunlap Farm.jpg|thumb|right|A farm near Hopkinton]]

According to the [[U.S. Census Bureau]], the county has a total area of {{convert|579|sqmi}}, of which {{convert|578|sqmi}} is land and {{convert|1.2|sqmi}} (0.2%) is water.<ref name="GR1">{{cite web|url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html|publisher=[[United States Census Bureau]]|access-date=April 23, 2011|date=February 12, 2011|title=US Gazetteer files: 2010, 2000, and 1990}}</ref> It has a rough hilly surface.<ref>{{Cite AmCyc|wstitle=Delaware (counties)|display=Delaware, the name of five counties in the United States. V. An E. county of Iowa}}</ref>

===Major highways===
*[[File:US 20.svg|x20px]] [[U.S. Route 20 in Iowa|U.S. Highway 20]]
*[[File:Circle sign 3.svg|x20px]] [[Iowa Highway 3]]
*[[File:Elongated circle 13.svg|x20px]] [[Iowa Highway 13]]
*[[File:Elongated circle 38.svg|x20px]] [[Iowa Highway 38]]

===Adjacent counties===
*[[Buchanan County, Iowa|Buchanan County]]  (west)
*[[Clayton County, Iowa|Clayton County]]  (north)
*[[Dubuque County, Iowa|Dubuque County]]  (east)
*[[Fayette County, Iowa|Fayette County]]  (northwest)
*[[Jones County, Iowa|Jones County]]  (southeast)
*[[Linn County, Iowa|Linn County]]  (southwest)

==Demographics==
{{US Census population
|1850= 1759
|1860= 11024
|1870= 17432
|1880= 17950
|1890= 17349
|1900= 19185
|1910= 17888
|1920= 18183
|1930= 18122
|1940= 18487
|1950= 17734
|1960= 18483
|1970= 18770
|1980= 18933
|1990= 18035
|2000= 18404
|2010= 17764
|2020= 17488
|estyear=2023
|estimate=17600
|estref=<ref name="USCensusEst2023">{{cite web|url=https://www.census.gov/programs-surveys/popest/data/tables.html|title=Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023|publisher=United States Census Bureau|access-date=April 2, 2024}}</ref>
|align-fn=center
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=July 16, 2014}}</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 16, 2014}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ia190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=July 16, 2014}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://web.archive.org/web/20100327165705/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=March 27, 2010 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=July 16, 2014}}</ref> 2010-2018<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/19/19055.html|publisher=United States Census Bureau|access-date=July 16, 2014|url-status=dead|archive-url=https://web.archive.org/web/20110607065137/http://quickfacts.census.gov/qfd/states/19/19055.html|archive-date=June 7, 2011}}</ref> 
}}
[[File:DelawareCountyIowaPop2020.png|thumb|right|Population of Delaware County from US census data]]

===2020 census===
[[File:DelawareCountyIA2022PopPyr.png|thumb|left|2022 US Census [[population pyramid]] for Delaware County from [[American Community Survey|ACS]] 5-year estimates]]
The 2020 census recorded a population of 17,488 in the county, with a population density of {{Pop density|17488|579.152815|sqmi|km2}}. 97.75% of the population reported being of one race. 94.60% were non-Hispanic White, 0.70% were Black, 1.40% were Hispanic, 0.29% were Native American, 0.27% were Asian, 0.01% were Native Hawaiian or Pacific Islander and 2.74% were some other race or more than one race. There were 8,100 housing units of which 7,141 were occupied.<ref name=cen2020/>

===2010 census===
The 2010 census recorded a population of 17,764 in the county, with a population density of {{Pop density|17764|577.85|sqmi|km2}}. There were 8,028 housing units, of which 7,062 were occupied.<ref name="USCB">{{cite web|url=https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-url=https://web.archive.org/web/20201016010401/https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-date=October 16, 2020 |url-status=live|title=Population & Housing Occupancy Status 2010|publisher=[[United States Census Bureau]] American FactFinder|access-date=August 15, 2022}}</ref>

===2000 census===
As of the [[census]]<ref name="GR2">{{cite web |url=https://www.census.gov |publisher=[[United States Census Bureau]] |access-date=January 31, 2008 |title=U.S. Census website }}</ref> of 2000, there were 18,404 people, 6,834 households, and 5,029 families residing in the county. The [[population density]] was {{convert|32|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 7,682 housing units at an average density of {{convert|13|/mi2|/km2|disp=preunit|units&nbsp;|units|}}. The racial makeup of the county was 99.28% [[Race (United States Census)|White]], 0.07% [[Race (United States Census)|Black]] or [[Race (United States Census)|African American]], 0.10% [[Race (United States Census)|Native American]], 0.14% [[Race (United States Census)|Asian]], 0.01% [[Race (United States Census)|Pacific Islander]], 0.10% from [[Race (United States Census)|other races]], and 0.30% from two or more races. 0.66% of the population were [[Race (United States Census)|Hispanic]] or [[Race (United States Census)|Latino]] of any race.

There were 6,834 households, out of which 36.70% had children under the age of 18 living with them, 64.10% were [[Marriage|married couples]] living together, 6.20% had a female householder with no husband present, and 26.40% were non-families. 23.00% of all households were made up of individuals, and 11.20% had someone living alone who was 65 years of age or older. The average household size was 2.66 and the average family size was 3.15.

In the county, the population was spread out, with 29.00% under the age of 18, 7.00% from 18 to 24, 27.60% from 25 to 44, 21.50% from 45 to 64, and 15.00% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 98.40 males. For every 100 females age 18 and over, there were 96.60 males.

The median income for a household in the county was $37,168, and the median income for a family was $43,607. Males had a median income of $30,712 versus $19,685 for females. The [[per capita income]] for the county was $17,327. About 6.30% of families and 7.90% of the population were below the [[poverty line]], including 8.50% of those under age 18 and 9.80% of those age 65 or over.

==Communities==

===Cities===
{{div col|colwidth=22em}}
*[[Colesburg, Iowa|Colesburg]]
*[[Delaware, Iowa|Delaware]]
*[[Delhi, Iowa|Delhi]]
*[[Dundee, Iowa|Dundee]]
*[[Dyersville, Iowa|Dyersville]]
*[[Earlville, Iowa|Earlville]]
*[[Edgewood, Iowa|Edgewood]]
*[[Greeley, Iowa|Greeley]]
*[[Hopkinton, Iowa|Hopkinton]]
*[[Manchester, Iowa|Manchester]]
*[[Masonville, Iowa|Masonville]]
*[[Ryan, Iowa|Ryan]]
{{div col end}}

===Townships===
Delaware County is divided into these [[Civil township|townships]]:
{{div col|colwidth=22em}}
* [[Adams Township, Delaware County, Iowa|Adams]]
* [[Bremen Township, Delaware County, Iowa|Bremen]]
* [[Coffins Grove Township, Delaware County, Iowa|Coffins Grove]]
* [[Colony Township, Delaware County, Iowa|Colony]]
* [[Delaware Township, Delaware County, Iowa|Delaware]]
* [[Delhi Township, Delaware County, Iowa|Delhi]]
* [[Elk Township, Delaware County, Iowa|Elk]]
* [[Hazel Green Township, Delaware County, Iowa|Hazel Green]]
* [[Honey Creek Township, Delaware County, Iowa|Honey Creek]]
* [[Milo Township, Delaware County, Iowa|Milo]]
* [[Prairie Township, Delaware County, Iowa|Prairie]]
* [[Richland Township, Delaware County, Iowa|Richland]]
* [[South Fork Township, Delaware County, Iowa|South Fork]]
* [[North Fork Township, Delaware County, Iowa|North Fork]]
* [[Oneida Township, Delaware County, Iowa|Oneida]]
* [[Union Township, Delaware County, Iowa|Union]]
{{div col end}}

===Unincorporated Communities===
{{div col|colwidth=22em}}
*[[Petersburg, Delaware County, Iowa|Petersburg]]
*[[Robinson, Iowa|Robinson]]
*[[Rockville, Iowa|Rockville]]
{{div col end}}

===Population ranking===
The population ranking of the following table is based on the [[2020 United States census|2020 census]] of Delaware County.<ref name=cen2020/>

'''†''' ''county seat''

{| class="wikitable sortable"
|-
!Rank
!City/Town/etc.
!Municipal type
!Population (2020 Census)

|- style="background-color:#FFFACD;"
| 1
|'''†''' '''[[Manchester, Iowa|Manchester]]''' 
| City
| 5,065
|- style="background-color:#FFFACD;"
| 2
|'''[[Dyersville, Iowa|Dyersville]]''' (''mostly in [[Dubuque County, Iowa|Dubuque County]]'')
| City
| 4,477
|- style="background-color:#FFFACD;"
| 3
|'''[[Edgewood, Iowa|Edgewood]]''' (''partially in [[Clayton County, Iowa|Clayton County]]'')
| City
| 909
|- style="background-color:#FFFACD;"
| 4
|'''[[Earlville, Iowa|Earlville]]''' 
| City
| 716
|- style="background-color:#FFFACD;"
| 5
|'''[[Hopkinton, Iowa|Hopkinton]]''' 
| City
| 622
|- style="background-color:#FFFACD;"
| 6
|'''[[Delhi, Iowa|Delhi]]''' 
| City
| 420
|- style="background-color:#FFFACD;"
| 7
|'''[[Colesburg, Iowa|Colesburg]]''' 
| City
| 386
|- style="background-color:#FFFACD;"
| 8
|'''[[Ryan, Iowa|Ryan]]''' 
| City
| 350
|- style="background-color:#FFFACD;"
| 9
|'''[[Greeley, Iowa|Greeley]]''' 
| City
| 217
|- style="background-color:#FFFACD;"
| 10
|'''[[Dundee, Iowa|Dundee]]''' 
| City
| 198
|- style="background-color:#FFFACD;"
| 11
|'''[[Delaware, Iowa|Delaware]]''' 
| City
| 142
|- style="background-color:#FFFACD;"
| 12
|'''[[Masonville, Iowa|Masonville]]''' 
| City
| 99
|}

==Politics==
{{PresHead|place=Delaware County, Iowa|whig=no|source1=<ref>{{Cite web|url=http://uselectionatlas.org/RESULTS|title=Dave Leip's Atlas of U.S. Presidential Elections|last=Leip|first=David|website=uselectionatlas.org|access-date=April 25, 2018}}</ref>}}
<!-- PresRow should be {{PresRow|Year|Winning party|GOP/Whig vote #|Dem vote #|3rd party vote #|State}} -->
{{PresRow|2024|Republican|6,984|2,978|176|Iowa}}
{{PresRow|2020|Republican|6,666|3,157|180|Iowa}}
{{PresRow|2016|Republican|5,694|2,957|590|Iowa}}
{{PresRow|2012|Republican|4,636|4,616|126|Iowa}}
{{PresRow|2008|Democratic|4,113|4,649|141|Iowa}}
{{PresRow|2004|Republican|4,908|4,227|65|Iowa}}
{{PresRow|2000|Republican|4,273|3,808|268|Iowa}}
{{PresRow|1996|Democratic|3,065|3,704|728|Iowa}}
{{PresRow|1992|Republican|3,195|3,093|2,204|Iowa}}
{{PresRow|1988|Democratic|3,425|3,947|60|Iowa}}
{{PresRow|1984|Republican|4,769|3,158|74|Iowa}}
{{PresRow|1980|Republican|4,316|2,671|807|Iowa}}
{{PresRow|1976|Republican|4,161|3,168|152|Iowa}}
{{PresRow|1972|Republican|4,848|2,944|128|Iowa}}
{{PresRow|1968|Republican|4,650|2,760|419|Iowa}}
{{PresRow|1964|Democratic|3,427|4,623|15|Iowa}}
{{PresRow|1960|Republican|5,015|3,688|0|Iowa}}
{{PresRow|1956|Republican|5,732|2,621|16|Iowa}}
{{PresRow|1952|Republican|6,449|2,351|10|Iowa}}
{{PresRow|1948|Republican|4,555|2,876|67|Iowa}}
{{PresRow|1944|Republican|5,164|2,498|20|Iowa}}
{{PresRow|1940|Republican|6,175|2,985|16|Iowa}}
{{PresRow|1936|Republican|4,483|4,350|213|Iowa}}
{{PresRow|1932|Democratic|4,088|4,559|107|Iowa}}
{{PresRow|1928|Republican|5,390|3,043|23|Iowa}}
{{PresRow|1924|Republican|4,938|1,146|1,551|Iowa}}
{{PresRow|1920|Republican|5,880|1,111|97|Iowa}}
{{PresRow|1916|Republican|2,827|1,332|74|Iowa}}
{{PresRow|1912|Democratic|1,394|1,399|1,271|Iowa}}
{{PresRow|1908|Republican|2,396|1,471|103|Iowa}}
{{PresRow|1904|Republican|2,726|1,236|104|Iowa}}
{{PresRow|1900|Republican|2,805|1,570|76|Iowa}}
{{PresFoot|1896|Republican|2,799|1,778|48|Iowa}}

==See also==
{{Portal|Iowa}}
*[[National Register of Historic Places listings in Delaware County, Iowa]]

==References==
{{Reflist|30em}}

==External links==
{{Commons}}
<!-- for current and future use if material is uploaded -->
*[http://co.delaware.ia.us County website]

{{Geographic Location
| Centre    = Delaware County, Iowa
| North     = [[Clayton County, Iowa|Clayton County]]
| Northeast =
| East      = [[Dubuque County, Iowa|Dubuque County]]
| Southeast = [[Jones County, Iowa|Jones County]]
| South     =
| Southwest = [[Linn County, Iowa|Linn County]]
| West      = [[Buchanan County, Iowa|Buchanan County]]
| Northwest = [[Fayette County, Iowa|Fayette County]]
}}

{{Delaware County, Iowa}}
{{Iowa}}
{{Authority control}}

{{Coord|42|28|10|N|91|22|13|W|region:US-IA_type:adm2nd_source:dewiki|display=title}}

[[Category:Delaware County, Iowa| ]]
[[Category:1837 establishments in Wisconsin Territory]]
[[Category:Populated places established in 1837]]