Johnson County, IA demographics:
population, income, and more

Total population
156,639
1.1% year-over-year change
Median household income
$74,935/yr
0.3% year-over-year change
Housing units
68,217
1.5% year-over-year change

Johnson County population

How many people live in Johnson County

Johnson County is home to 156,639 residents, according to the most recent Census data. Gender-wise, 49.7% of Johnson County locals are male, and 50.3% are female.

Total population
156,639
1.1% year-over-year change
Gender ratio
Male
49.7%
77,848
Female
50.3%
78,791
Value Percent YoY change
Male 77,848 49.7% 1.1%
Female 78,791 50.3% 1.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Johnson County is 31, with the population distributed as follows: about 16.1% are children under 15, then 24% are in the 15 to 24 age group. Adults between 25 and 44 make up 27.2% of the population, while another 19.4% fall into the 45 to 64 bracket. Finally, around 13.3% are 65 or older.

Median age
31
Age breakdown
Under 15
16.1%
15 to 24
24%
25 to 44
27.2%
45 to 64
19.4%
Over 65
13.3%
Value Percent YoY change
Under 15 25,192 16.1% -0.3%
15 to 24 37,613 24% 0.8%
25 to 44 42,680 27.2% 1.2%
45 to 64 30,320 19.4% 0.5%
Over 65 20,834 13.3% 4.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Johnson County, 89% of the population are US-born citizens, while 5.7% have gained naturalized citizenship. At the same time, 5.2% of residents are non-citizens. As for race, 76.4% of locals are Caucasian, 7.7% are African American and 5.6% have Asian roots. There’s also a share of 7.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
89%
Non-U.S.-born citizens
5.7%
Non-citizens
5.2%
Value Percent YoY change
U.S.-born citizens 139,490 89% 1.6%
Non-U.S.-born citizens 8,977 5.7% 6.5%
Non-citizens 8,172 5.2% -10.3%
Racial breakdown
White
76.4%
Black or African American
7.7%
American Indian and Alaska Native
0.2%
Asian
5.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.7%
Other
2.4%
Value Percent
White 119,654 76.4%
Black or African American 12,059 7.7%
American Indian and Alaska Native 273 0.2%
Asian 8,849 5.6%
Native Hawaiian and other Pacific Islander 31 0%
Two or more races 12,096 7.7%
Other 3,677 2.4%

Households in Johnson County

A peek inside Johnson County households

Johnson County has 63,341 households, with an average of 2 members in each. Of these, 51.6% are families, while the remaining 48.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
63,341
1.8% year-over-year change
Average people per household
2
Non-family households
30,674
Family households
32,667
Value Percent YoY change
Non-family households 30,674 48.4% 3.8%
Family households 32,667 51.6% 0.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Johnson County

The housing landscape of Johnson County

Johnson County's housing consists of 68,217 units, with 48% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 11.7% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 3.8% of the housing landscape.

Housing units
68,217
1.5% year-over-year change
Housing types
Value Percent
1 unit, detached 32,754 48%
1 unit, attached 7,961 11.7%
2 units 1,679 2.5%
3 or 4 units 2,321 3.4%
5 to 9 units 4,927 7.2%
10 to 19 units 6,439 9.4%
20 to 49 units 5,284 7.8%
50 or more units 4,254 6.2%
Mobile home 2,574 3.8%
Boat, RV, van, etc. 24 0%
Homes built since 2020
1,870
79.0% year-over-year change

The age of buildings in Johnson County

In Johnson County, the median construction year is 1992. About 9.4% of homes were built before the 1940s, with another 1.8% going up by 1949. Most development happened in the second half of the 20th century. Then, 15.8% of homes were added from 2000 to 2009, 18.8% between 2010 and 2019, and 2.7% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 6,444 9.4% -1.4%
Built between 1940 and 1949 1,193 1.8% -2.3%
Built between 1950 and 1959 3,664 5.4% 4.0%
Built between 1960 and 1969 5,742 8.4% -0.7%
Built between 1970 and 1979 8,046 11.8% -3.6%
Built between 1980 and 1989 6,871 10.1% -4.6%
Built between 1990 and 1999 10,795 15.8% 4.7%
Built between 2000 and 2009 10,802 15.8% -1.5%
Built between 2010 and 2019 12,790 18.8% 4.2%
Built in 2020 or later 1,870 2.7% 79.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Johnson County occupancy rates

Out of the 63,341 occupied housing units in Johnson County, 59.4% are owner-occupied, while 40.6% are lived in by tenants. Meanwhile, 7.1% of all homes on the local market sit vacant.

Occupied housing units
63,341
1.8% year-over-year change
Occupancy breakdown
Renter occupied
25,736
Owner occupied
37,605
Value Percent YoY
change
Renter occupied 25,736 40.6% 0.5%
Owner occupied 37,605 59.4% 2.7%
Unoccupied housing units
7.1%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Johnson County housing costs

Housing costs in Johnson County come to a median of $1,248 per month, while tenants specifically pay a median gross rent of $1,122.

Median housing costs per month
$1,248/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Johnson County
$1,122/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Johnson County

Johnson County education at a glance

About 19.4% of the population in Johnson County went to high school, while 24.6% pursued college studies. Another 8.4% earned an associate degree and 28.1% hold a bachelor’s. Meanwhile, 18.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 1,829 1.4% -0.4%
High school diploma 24,498 19.4% 0.9%
College diploma 31,130 24.6% -2.3%
Associate degree 10,554 8.4% 9.4%
Bachelor's degree 35,527 28.1% 2.6%
Graduate degree 22,825 18.1% 2.1%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Johnson County

How much people earn in Johnson County

The average annual household income in Johnson County was $108,874 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -0.1% change from the previous year. At the same time, the median income stood at $74,935, reflecting a +0.3% shift over the same period.

Average household income in Johnson County
$108,874/year
-0.1% year-over-year change
Median household income in Johnson County
$74,935/year
0.3% year-over-year change

Johnson County income by age

In Johnson County, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $82,936. Those with someone between 45 and 64 in charge, often well established professionally, earn $110,901 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $27,855, while those led by someone over 65, many of whom may be retired, have about $70,562 in earnings. Overall, 82.8% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $27,855 11.5%
25 - 44 $82,936 -1.5%
45 - 64 $110,901 2.3%
Over 65 $70,562 -0.0%
Above poverty level
121,728
Below poverty level
25,214
Value Percent YoY
change
Above poverty level 121,728 82.8% 0.7%
Below poverty level 25,214 17.2% 3.0%

Employment in Johnson County

Workforce and job types in Johnson County

The job market in Johnson County is powered by 86,630 working residents, spread across a range of industries and roles. 85% of the working population are employed in professional or administrative positions, while 15% are in hands-on or service-based jobs. Also, 8.3% run their own businesses, 54.3% are employed by private companies, and 27.5% work in the public sector.

Workforce demographics

Working population
86,630
0.9% year-over-year change
White collar
73,598
Blue collar
13,032
Value Percent YoY change
White collar 73,598 85% 1.4%
Blue collar 13,032 15% -1.7%
Employer type
Self employees
8.3%
Private companies
54.3%
Governmental workers
27.5%
Not for profit companies
9.9%
Value Percent YoY change
Self employees 7,184 8.3% 2.0%
Private companies 47,056 54.3% 1.1%
Governmental workers 23,837 27.5% -0.7%
Not for profit companies 8,553 9.9% 3.0%
Unemployment rate
3.8%
4.3% year-over-year change

Available workforce

The unemployment rate in Johnson County stands at 3.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Johnson County

How people get around in Johnson County

Commuting methods vary: 71.5% of residents travel by personal vehicle and 8.2% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 60,374 71.5% -0.6%
Taxicab 126 0.2% 21.1%
Bus or trolleybus 3,073 3.6% -10.0%
Subway or elevated 25 0% N/A
Ferryboat 25 0% N/A
Motorcycle 221 0.3% 19.5%
Bicycle 1,448 1.7% -9.6%
Walk 6,908 8.2% 4.1%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Johnson County by zipcode?

Zipcode Population Number of households Median income Average income
52203 2,231 842 $101,950 $121,967
52228 3,802 1,416 $118,125 $175,757
52235 974 438 $83,333 $89,732
52240 35,074 15,417 $52,960 $81,157
52241 23,250 10,001 $69,243 $104,721
52242 4,688 21 $0 $0
52245 22,853 9,543 $78,020 $103,699
52246 22,308 9,651 $62,521 $106,808
52247 5,914 2,115 $91,450 $114,031
52253 2,622 1,050 $104,821 $125,084

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FAQs about Johnson County demographics 

What is the total population of Johnson County?

Johnson County has a total population of 156,639 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.1% compared to a year ago.

What is the gender ratio in Johnson County?

The gender ratio in Johnson County is as follows:
  • 49.7% males (77,848 residents)
  • 50.3% females (78,791 residents)

What is the median age in Johnson County?

The median age in Johnson County is 31.

What is the age distribution of the population in Johnson County?

The age distribution in Johnson County is as follows:
  • Under 15: 16.1% (25,192 residents)
  • Ages 15-24: 24% (37,613 residents)
  • Ages 25-44: 27.2% (42,680 residents)
  • Ages 45-64: 19.4% (30,320 residents)
  • Over 65: 13.3% (20,834 residents)

What is the racial and ethnic makeup of Johnson County?

The racial and ethnic makeup of Johnson County is as follows:
  • White: 76.4% (119,654 residents)
  • Black or African American: 7.7% (12,059 residents)
  • American Indian and Alaska Native: 0.2% (273 residents)
  • Asian: 5.6% (8,849 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (31 residents)
  • Two or More Races: 7.7% (12,096 residents)
  • Other: 2.4% (3,677 residents)

What percentage of the population in Johnson County are U.S.-born citizens?

U.S.-born citizens represent 89% of the population in Johnson County.

How many housing units are there in Johnson County?

There are 68,217 housing units in Johnson County, reflecting a +1.5% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Johnson County and what is the average household size?

Johnson County has a total of 63,341 households, with an average of 2 people in each.

What is the median household income in Johnson County?

Johnson County has a median household income of $74,935, representing a +0.3% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Johnson County?

The employment rate is 96.2% in Johnson County, with a workforce of 86,630 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 85% (73,598 residents)
  • Blue-collar workers: 15% (13,032 residents)

Places of employment:
  • Self-employed: 8.3% (7,184 residents)
  • Private companies: 54.3% (47,056 residents)
  • Governmental workers: 27.5% (23,837 residents)
  • Not-for-profit companies: 9.9% (8,553 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025