Delaware County, Iowa

{{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

| 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 located in the U.S. state of Iowa. As of the 2020 census, the population was 17,488.{{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}} The county seat is Manchester.{{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 }} The county takes its name after the U.S. state of Delaware.

Geography

File:The Tony Dunlap Farm.jpg

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.{{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}} It has a rough hilly surface.{{Cite AmCyc|wstitle=Delaware (counties)|display=Delaware, the name of five counties in the United States. V. An E. county of Iowa}}

=Major highways=

=Adjacent counties=

Buchanan County (west)
Clayton County (north)
Dubuque County (east)
Fayette County (northwest)
Jones County (southeast)
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={{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}}

|align-fn=center

|footnote=U.S. Decennial Census{{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}}
1790-1960{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=July 16, 2014}} 1900-1990{{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}}
1990-2000{{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}} 2010-2018{{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}}

}}

File:DelawareCountyIowaPop2020.png

=2020 census=

File:DelawareCountyIA2022PopPyr.png for Delaware County from 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.

=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.{{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}}

=2000 census=

As of the census{{cite web |url=https://www.census.gov |publisher=United States Census Bureau |access-date=January 31, 2008 |title=U.S. Census website }} 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 |people}}. There were 7,682 housing units at an average density of {{convert|13|/mi2|/km2|disp=preunit|units |units|}}. The racial makeup of the county was 99.28% White, 0.07% Black or African American, 0.10% Native American, 0.14% Asian, 0.01% Pacific Islander, 0.10% from other races, and 0.30% from two or more races. 0.66% of the population were Hispanic or 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 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=

=Townships=

Delaware County is divided into these townships:

=Unincorporated Communities=

=Population ranking=

The population ranking of the following table is based on the 2020 census of Delaware County.

† county seat

class="wikitable sortable"
Rank !City/Town/etc. !Municipal type !Population (2020 Census)
style="background-color:#FFFACD;" \| 1 \|† Manchester \| City \| 5,065
style="background-color:#FFFACD;" \| 2 \|Dyersville (mostly in Dubuque County) \| City \| 4,477
style="background-color:#FFFACD;" \| 3 \|Edgewood (partially in Clayton County) \| City \| 909
style="background-color:#FFFACD;" \| 4 \|Earlville \| City \| 716
style="background-color:#FFFACD;" \| 5 \|Hopkinton \| City \| 622
style="background-color:#FFFACD;" \| 6 \|Delhi \| City \| 420
style="background-color:#FFFACD;" \| 7 \|Colesburg \| City \| 386
style="background-color:#FFFACD;" \| 8 \|Ryan \| City \| 350
style="background-color:#FFFACD;" \| 9 \|Greeley \| City \| 217
style="background-color:#FFFACD;" \| 10 \|Dundee \| City \| 198
style="background-color:#FFFACD;" \| 11 \|Delaware \| City \| 142
style="background-color:#FFFACD;" \| 12 \|Masonville \| City \| 99

class="wikitable sortable"

Rank

!City/Town/etc.

!Municipal type

!Population (2020 Census)