Editing Delaware County, Pennsylvania (section)

==Demographics==
{{US Census population
|1790= 9469
|1800= 12809
|1810= 14734
|1820= 14810
|1830= 17323
|1840= 19791
|1850= 24679
|1860= 30597
|1870= 39403
|1880= 56101
|1890= 74683
|1900= 94762
|1910= 117906
|1920= 173084
|1930= 280264
|1940= 310756
|1950= 414234
|1960= 553154
|1970= 600035
|1980= 555007
|1990= 547651
|2000= 550864
|2010= 558979
|2020= 576830
|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=May 31, 2017}}</ref><br />1790–1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu/|title=Historical Census Browser|publisher=University of Virginia Library|access-date=May 31, 2017|archive-date=August 11, 2012|archive-url=https://web.archive.org/web/20120811110448/http://mapserver.lib.virginia.edu/|url-status=dead}}</ref> 1900–1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/pa190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=May 31, 2017}}</ref><br />1990–2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://ghostarchive.org/archive/20221009/https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=October 9, 2022 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=May 31, 2017}}</ref> 2010–2019<ref name="QF">{{cite web |title=State & County QuickFacts |url=http://www.co.delaware.pa.us/planning/demodata/CountywideFactSheet.pdf |publisher=Delaware County |archive-url=https://web.archive.org/web/20170208133232/http://www.co.delaware.pa.us/planning/demodata/CountywideFactSheet.pdf |archive-date=February 8, 2017}}</ref><ref>{{cite web |title=Census 2020 |url=https://www.census.gov/quickfacts/fact/table/delawarecountypennsylvania/PST045219}}</ref>
}}

As of the [[2020 United States census|2020 census]], the county was 63% White non-Hispanic, 22% Black or African American, 0.1% Native American or Alaskan Native, 6.3% Asian, 4.6% Hispanic or Latino, 0.1% Native Hawaiian, and 3.5% were two or more races.

As of the [[2000 United States Census|2000 census]], there were 550,864 people, 206,320 households, and 139,472 families residing in the county. The population density was {{convert|2990|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 216,978 housing units at an average density of {{convert|1178|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the county was 80.3% White, 14.5% African American, 0.1% [[Race (United States Census)|Native American]], 3.3% Asian, <0.1% Pacific Islander, 0.6% from other races, and 1.2% from two or more races. 1.5% of the population were [[Hispanics in the United States|Hispanic]] or [[Hispanic and Latino Americans|Latino]] of any race. 24.6% were of Irish, 17.5% Italian, 10.1% German and 6.7% English ancestry.

There were 206,320 households, out of which 31.5% had children under the age of 18 living with them, 50.8% were married couples living together, 12.9% had a female householder with no husband present, and 32.4% were non-families. 27.6% of all households were made up of individuals, and 11.6% had someone living alone who was 65 years of age or older. The average household size was 2.56 and the average family size was 3.17.

In the county, the population was spread out, with 24.8% under the age of 18, 8.9% from 18 to 24, 28.8% from 25 to 44, 21.9% from 45 to 64, and 15.6% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 91.2 males. For every 100 females age 18 and over, there were 86.9 males.

The median income for a household in the county was $50,092, and the median income for a family was $61,590. Males had a median income of $44,155 versus $31,831 for females. The per capita income for the county was $25,040. About 5.8% of families and 8.0% of the population were below the poverty line, including 10.0% of those under age 18 and 7.1% of those age 65 or over.

===2020 census===
{| class="wikitable"
|+Delaware County Racial Composition<ref>{{Cite web|title =P2 HISPANIC OR LATINO, AND NOT HISPANIC OR LATINO BY RACE – 2020: DEC Redistricting Data (PL 94-171) – Delaware County, Pennsylvania|url=https://data.census.gov/cedsci/table?q=Delaware%20County,%20Pennsylvania&t=Race%20and%20Ethnicity&tid=DECENNIALPL2020.P2}}</ref>
!Race
!Num.
!Perc.
|-
|[[White (U.S. Census)|White]] (NH)
|363,249
|63%
|-
|[[African American (U.S. Census)|Black or African American]] (NH)
|127,055
|22%
|-
|[[Native American (U.S. Census)|Native American]] (NH)
|676
|0.12%
|-
|[[Asian (U.S. Census)|Asian]] (NH)
|36,317
|6.3%
|-
|[[Pacific Islander (U.S. Census)|Pacific Islander]] (NH)
|133
|0.02%
|-
|[[Race (United States Census)|Other/Mixed]] (NH)
|22,628
|3.9%
|-
|[[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]]
|26,772
|4.6%
|}