Johnson County, Iowa

Johnson County is a county in the United States of Iowa. As of 2000 the population was 111006. As of July 2008, the estimated population was 128094, making it Iowa's fifth largest county. It has total area of 623.35 miē (1614.47 kmē), of which, 614.48 square miles (1591.5 kmē) of it is land and 8.87 square miles (22.97 kmē) of it is water, it is the 20th largest by area in the U.S. state of Iowa.

Johnson County Iowa
Map of Johnson County, Iowa

As of the census of 2000, there were 111006 people in the county, organized into 44080 households, and 23578 families living in the county. The population density was 180.7 people per square mile (69.77/kmē), making it the fifth most densely populated county in Iowa. There were 45831 housing units at an average density of 74.6 per square mile (28.8/kmē). The average household size was 2.34 persons, and the average family size was 2.97 persons. In the county the population is diverse age-wise, with 20.1% under the age of 18, 23.4% from 18 to 24, 30.8% from 25 to 44, 18.2% from 45 to 64, and 7.4% who were 65 or older. For every 100 females there were 99.1 males. For every 100 females age 18 and over, there were 97.3 males. As of July 2008, the population was estimated at 128094, The racial or ethnic makeup of the county was 114657 White, 5233 Black or African American, 405 American Indian, 5900 Asian, 57 Native Hawaiian, and 1842 from two or more races.

Johnson County Iowa Population 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
Population 2000-2008
Johnson County Iowa School Enrollment
School Enrollment 2000
Johnson County Iowa GDP
GDP 2000

The median income for a household in the county was $40060, it would be the 20th highest county by median household income in the U.S. state of Iowa. The median income for a family in the county was $60112, making it the wealthiest county by median family income among the Iowa. The per capita income for the county was $22220, making it the fourth highest county by per capita income in Iowa.

In 2000, 45029 pupils and students, of which 22599 are male and 22430 are female, 40.56% of the total population, are in the education system. Of which, total enrollment of student are in, 1955 nursery or pri school, 1293 kindergarten, 9804 elementary school, 5092 high school and 26885 College graduate school.

RankCityCountyTotal Area mi2Land Area mi2Water Area mi2PopulationDensity mi2Per capita IncomeHouse hold Income
1West Branch CityCedar County, Johnson County1.981.98021881106.81957742500
2Coralville CityJohnson County10.2310.190.04151231484.12328338080
3Hills CityJohnson County0.60.606791140.92191851477
4Iowa City CityJohnson County24.4424.160.286222025752026934977
5Lone Tree CityJohnson County0.990.99011511165.31899042431
6North Liberty CityJohnson County6.786.7805367791.92133942500
7Oxford CityJohnson County0.520.5207051346.31833537292
8Shueyville CityJohnson County1.491.490250167.62469061875
9Solon CityJohnson County1.331.3301177887.11802946953
10Swisher CityJohnson County0.460.4608131769.62459663667
11Tiffin CityJohnson County2.992.990975326.22022242381
12University Heights CityJohnson County0.270.2709873626.33248448929
YearPopulation
April 2000 census111006
April 2000 Estimate111006
July 2000 Estimate111461
July 2001 Estimate113849
July 2002 Estimate115534
July 2003 Estimate117460
July 2004 Estimate119764
July 2005 Estimate121236
July 2006 Estimate123126
July 2007 Estimate125454
July 2008 Estimate128094
SchoolMaleFemaleTotal
Nursery school9829731955
Kindergarten6066871293
Elementary school524145639804
High school268524075092
College or graduate school130851380026885
PlaceMedian household incomeMedian family incomePer capita income
Johnson County, Iowa$40060$60112$22220
Iowa, United States$39469$48005$19674
United States$41994$50046$21587