Johnson County, Iowa Demographics 2026

Name: Johnson County, Iowa Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Johnson County, Iowa has a population of 156,639, the 4th most populous county in Iowa. The median household income is $74,935 and the median home value is $308,600. The poverty rate is 17.1%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Johnson County Quick Facts

Population 156,639

Median Household Income $74,935

Median Home Value $308,600

Poverty Rate 17.1%

Unemployment Rate 3.8%

Median Age 31.0 years

Homeownership Rate 59.4%

Affordability Ratio 4.1x

Bachelor's Degree+ 55.2%

High School Graduation 96.3%

Cities/Places 13

Population 156,639 4th of 99

Median Income $74,935 about the same as state

Poverty Rate 17.1%

Unemployment 3.8%

How Johnson County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	154,881	156,639	+1.1%
Median household income	$74,721	$74,935	+0.3%
Median home value	$293,100	$308,600	+5.3%

Median Household Income

Johnson

$74,935

$75,059

National

$80,734

Median Home Value

Johnson

$308,600

$208,000

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 16.6%

$25K-$50K 17.3%

$50K-$100K 27.6%

$100K+ 38.5%

Detailed income brackets

Under $10K

6.1%

$10K-$15K

3.7%

$15K-$20K

3.2%

$20K-$25K

3.6%

$25K-$30K

3.7%

$30K-$35K

3.9%

$35K-$40K

3.5%

$40K-$45K

3.0%

$45K-$50K

3.1%

$50K-$60K

6.8%

$60K-$75K

9.3%

$75K-$100K

11.5%

$100K-$125K

9.8%

$125K-$150K

7.8%

$150K-$200K

8.8%

$200K+

12.0%

Employment

3.8% Unemployment Rate State: 3.6%|National: 5.2%

69.5% Labor Force Participation

Housing Overview

Owner 59.4%

Renter 40.6%

Affordability Index Moderate

4.1x home value to income ratio

Median gross rent $1,122/mo 18.0% of median household income annually

People & Demographics

Age Distribution

Under 18

19.3%

18-34

35.6%

35-54

22.3%

55-74

17.5%

75+

5.3%

Race & Ethnicity

Diversity Index

Moderate Diversity

Moderate diversity with one or two groups making up the majority.

State average: 31 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Johnson County

City	Population	Median Income	Poverty	Home Value
Iowa City	75,752	$58,546	26.3%	$285,900
Coralville	23,234	$69,144	13.0%	$298,500
North Liberty	21,125	$102,102	6.1%	$303,800
Tiffin	5,737	$100,952	7.6%	$338,500
Solon	3,152	$113,295	3.2%	$309,400
West Branch	2,594	$92,209	6.4%	$216,100
University Heights	1,384	$111,406	14.4%	$429,900
Lone Tree	1,218	$90,625	4.9%	$179,800
Swisher	1,182	$100,577	6.9%	$260,300
Hills	974	$83,333	8.4%	$240,200
Oxford	779	$82,639	3.3%	$215,200
Shueyville	740	$123,333	1.8%	$574,800
Frytown	113	$104,911	0.0%	N/A

Explore Iowa Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Johnson County is located in Iowa with a total population of 156,639. It is the 4th most populous county out of 99 in Iowa. The county encompasses 13 Census-designated places.

Age Demographics

The median age in Johnson County is 31.0 years. This is 20% lower than the state median of 38.6 years.

Economy, Income & Housing

The median household income in Johnson County is $74,935. This is about the same as the state median of $75,059. It is also 7% lower than the national median of $80,734. The poverty rate stands at 17.1%. This is 54% higher than the state poverty rate of 11.1%. The unemployment rate is 3.8%. This is 5% higher than the state rate of 3.6%. The median home value is $308,600. Housing costs are 48% higher than the state median of $208,000. The home-value-to-income ratio is 4.1x. 59.4% of occupied housing units are owner-occupied. This homeownership rate is 17% lower than the state average of 71.7%.

Race & Ethnicity

The largest racial or ethnic group in Johnson County is White (non-Hispanic), making up 74.8% of the population. Black or African American residents account for 7.6%. The Black or African American population is significantly higher than the state average (7.6% vs 3.8%). The Asian population is significantly higher than the state average (5.6% vs 2.5%).

Education

55.2% of residents aged 25 and older hold a bachelor's degree or higher. This places Johnson County in the top 10% of all counties in the state for educational attainment. This is 76% higher than the state rate of 31.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.3%. Notably, 24.1% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All figures for Johnson County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Iowa and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Johnson County, Iowa?

Johnson County has a population of 156,639, making it the 4th most populous county in Iowa.

What is the median income in Johnson County?

The median household income in Johnson County is $74,935 with a poverty rate of 17.1%.

How many cities are in Johnson County, Iowa?

Johnson County contains 13 Census-designated places.