Delaware County, Iowa

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Delaware County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 17,488.<ref name=cen2020>Template:Cite web</ref> The county seat is Manchester.<ref name="GR6">Template:Cite web</ref> The county takes its name after the U.S. state of Delaware.

Geography

File:The Tony Dunlap Farm.jpg

A farm near Hopkinton

According to the U.S. Census Bureau, the county has a total area of Template:Convert, of which Template:Convert is land and Template:Convert (0.2%) is water.<ref name="GR1">Template:Cite web</ref> It has a rough hilly surface.<ref>Template:Cite AmCyc</ref>

Major highways

Adjacent counties

Buchanan County (west)
Clayton County (north)
Dubuque County (east)
Fayette County (northwest)
Jones County (southeast)
Linn County (southwest)

Demographics

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File:DelawareCountyIowaPop2020.png

Population of Delaware County from US census data

2020 census

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2022 US Census population pyramid 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 Template:Pop density. 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 Template:Pop density. There were 8,028 housing units, of which 7,062 were occupied.<ref name="USCB">Template:Cite web</ref>

2000 census

As of the census<ref name="GR2">Template:Cite web</ref> of 2000, there were 18,404 people, 6,834 households, and 5,029 families residing in the county. The population density was Template:Convert. There were 7,682 housing units at an average density of Template:Convert. 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

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Townships

Delaware County is divided into these townships: Template:Div col

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Unincorporated Communities

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Population ranking

The population ranking of the following table is based on the 2020 census of Delaware County.<ref name=cen2020/>

† county seat

Rank	City/Town/etc.	Municipal type	Population (2020 Census)
1	† Manchester	City	5,065
2	Dyersville (mostly in Dubuque County)	City	4,477
3	Edgewood (partially in Clayton County)	City	909
4	Earlville	City	716
5	Hopkinton	City	622
6	Delhi	City	420
7	Colesburg	City	386
8	Ryan	City	350
9	Greeley	City	217
10	Dundee	City	198
11	Delaware	City	142
12	Masonville	City	99