COUNTY · 1990 CENSUS
Johnson County
Iowa · 96,119 residents · 612.997 sq mi
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Part of the Iowa City metro area
The short version
Johnson County has roughly average household income, with a median household income of $27,862. Population has declined 13% since 2000. 44% of adults hold a bachelor's degree or higher, well above the national rate of 20%. Median home value is $76,600. At a median age of 27.3, residents skew younger than the country as a whole.
At a glance
Lower income
below the US median
US median: $30,130
Younger
median age 27.3
US median: 33.0
More educated
44% hold a bachelor's degree
US average: 20%
More affordable
home values down 18%, inflation adjusted
US median home: $93,722
Section 01
Population & growth
Population, 1990 – 2024
2024157K
Age distribution, 1990
Under 56.4%(6,186)
5 to 96.2%(5,942)
10 to 144.8%(4,626)
15 to 199%(8,620)
20 to 2418.4%(17,692)
25 to 3420.5%(19,679)
35 to 4414.8%(14,228)
45 to 547.1%(6,861)
55 to 645.3%(5,122)
65 to 744.1%(3,935)
75 to 842.5%(2,362)
85 and over0.9%(866)
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy
$27,862
−8%inflation adjusted, since 2000
vs $40,060 in 2000
US average: $30,130
1990 – 2024
Section 03
Housing
$76,600
−18%inflation adjusted, since 2000
vs $123,700 in 2000
US average: $93,722
1990 – 2024
RELATED:See current rent listings in Johnson County on RentDataNow
Section 04
Race & ethnicity
2000
White, non-Hispanic88.8%(98,619)
Black2.8%(3,148)
Hispanic / Latino2.5%(2,781)
Asian4.1%(4,557)
Other0%
1990
White, non-Hispanic93.5%(89,835)
Black2.1%(2,010)
Hispanic / Latino1.2%(1,186)
Asian3.9%(3,731)
Other0.6%(543)
No data for the years selected.
Section 04 · Origins
Detailed origins & ancestry
Detailed origin tables are available for 2024; showing 2024 data.
Hispanic origin
Mexican3.9%(6,166)
Central American0.9%(1,394)
South American0.7%(1,086)
Puerto Rican0.5%(795)
Colombian0.4%(697)
Honduran0.3%(440)
Salvadoran0.3%(422)
Guatemalan0.2%(341)
Spaniard0.1%(159)
Ecuadorian0.1%(112)
Panamanian0.1%(107)
Cuban0.1%(89)
+ 7 more hispanic origin groups with data
Venezuelan0.1%(88)
Nicaraguan0.1%(84)
Chilean0%(71)
Dominican0%(70)
Bolivian0%(43)
Peruvian0%(41)
Argentine0%(34)
Asian origin
Chinese1.6%(2,526)
Asian Indian1.2%(1,909)
Vietnamese0.7%(1,059)
Korean0.7%(1,053)
Filipino0.3%(516)
Laotian0.1%(179)
Taiwanese0.1%(172)
Japanese0.1%(158)
Nepalese0.1%(157)
Hmong0.1%(132)
Uzbek0.1%(79)
Indonesian0%(77)
+ 7 more asian origin groups with data
Singaporean0%(68)
Thai0%(68)
Bangladeshi0%(50)
Sri Lankan0%(47)
Cambodian0%(31)
Pakistani0%(30)
Burmese0%(12)
Ancestry
German28%(43,919)
Irish14.5%(22,790)
English11.8%(18,463)
Norwegian3.8%(5,929)
Subsaharan African3.7%(5,852)
Italian3.1%(4,885)
American2.9%(4,491)
Czech2.6%(4,087)
Swedish2.6%(4,043)
Polish2.2%(3,453)
Dutch1.8%(2,870)
Scottish1.7%(2,681)
+ 46 more ancestry groups with data
French1.2%(1,924)
Danish1.1%(1,792)
Arab1%(1,614)
Scotch-Irish0.7%(1,151)
Welsh0.7%(1,139)
Swiss0.6%(928)
British0.4%(619)
Russian0.4%(609)
French Canadian0.4%(603)
Greek0.3%(484)
Belgian0.3%(396)
Hungarian0.2%(386)
Lithuanian0.2%(384)
Kenyan0.2%(358)
Palestinian0.2%(332)
Jordanian0.2%(324)
Lebanese0.2%(292)
West Indian0.2%(292)
Ukrainian0.2%(271)
Iranian0.2%(249)
Ghanaian0.2%(242)
Nigerian0.2%(239)
Slovak0.1%(218)
Austrian0.1%(209)
Croatian0.1%(189)
Egyptian0.1%(161)
Finnish0.1%(155)
Brazilian0.1%(150)
Serbian0.1%(138)
Jamaican0.1%(107)
Romanian0.1%(98)
Trinidadian & Tobagonian0.1%(96)
Israeli0%(77)
Portuguese0%(74)
Canadian0%(65)
Syrian0%(57)
Somali0%(53)
Turkish0%(52)
Haitian0%(52)
Iraqi0%(49)
Latvian0%(45)
Armenian0%(41)
Slovene0%(35)
Australian0%(27)
Guyanese0%(27)
Ethiopian0%(11)
Section 05
Education
High school or higher
90.6%
−3.1 ptsvs 2000
vs 93.7% in 2000
US average: 75.2%
Section 06
Commute & transportation
Section 07
Work & employment
No data for the years selected.
Section 08
People & community
No data for the years selected.
Marital status (2024)
Men 15+
Never married47.9%(31,002)
Married45.3%(29,307)
Widowed1.9%(1,208)
Divorced5%(3,231)
Women 15+
Never married43.3%(28,907)
Married42.4%(28,306)
Widowed4.9%(3,300)
Divorced9.3%(6,186)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
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Compare Johnson County to nearby counties
JOHNSON COUNTY VS
Iowa County
Income$71,223+156%
Home value$193,900+153%
Population16,504−90%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Washington County
Income$75,647+172%
Home value$203,900+166%
Population22,667−86%
SEE FULL COMPARISON →
JOHNSON COUNTY VS
Cedar County
Income$80,602+189%
Home value$211,300+176%
Population18,359−89%
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JOHNSON COUNTY VS
Muscatine County
Income$69,396+149%
Home value$182,100+138%
Population41,853−74%
SEE FULL COMPARISON →
Frequently asked
How many people live in Johnson County, Iowa?
Johnson County, Iowa has about 96,119 residents according to the 1990 Census.
What is the median household income in Johnson County, Iowa?
The typical household in Johnson County, Iowa earns about $27,862 a year. Half of households make more than that, and half make less.
Is Johnson County, Iowa expensive?
In Johnson County, Iowa, the median home is worth about $76,600, and the typical rent is about $412 a month.
How educated are people in Johnson County, Iowa?
About 44.0% of adults age 25 and over in Johnson County, Iowa hold a bachelor's degree or higher.
What is the poverty rate in Johnson County, Iowa?
About 17.1% of people in Johnson County, Iowa live below the federal poverty line.
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36 census tracts (top 20 by population)
Census Tract 103.03Census Tract 101Census Tract 103.04Census Tract 1Census Tract 103.05Census Tract 105.01Census Tract 18.01Census Tract 103.08Census Tract 102Census Tract 4.02Census Tract 21Census Tract 5.01Census Tract 11Census Tract 18.02Census Tract 14Census Tract 3.05Census Tract 2Census Tract 3.06Census Tract 23Census Tract 16.0113 ZIP codes
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All counties in IowaDATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024