Johnston, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Johnston, Iowa is 24,196 as of the 2023 American Community Survey, making it the 22nd-largest city in Iowa. The median household income is $103,430, the median home value is $346,200, and the median age is 38.4.
The population has grown 44.0% since 2010 (17,380 → 25,022).
24,196
Population
1241
People / sq mi
$103,430
Median Income
$346,200
Median Home Value
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Johnston covers 19.5 sq mi of land at 1241 people per square mile.
About Johnston, IA
Educational attainment is the headline number in Johnston: 57.9% of adults 25 and older have a four-year degree. Johnston is a city in Iowa with a population of 24,196. It ranks #22 among cities in Iowa by population.
Households take in a median $103,430, comfortably above the US median of $78,538. The poverty rate is 5.3%, below the national 12.4%. Median home value is $346,200, with typical rent around $1,288.
Educational attainment is on the higher side for US cities — 57.9% of adults hold a four-year degree, above the national 35.0%. Around 14.5% of workers work from home, close to the national 14.0%, and the average commute runs about 19 minutes each way.
The education numbers are the throughline: a college-heavy population in Johnston usually coincides with higher incomes and a workforce concentrated in professional and information industries.
Johnston city Population History (2010-2024)
The city of Johnston city had a population of 17,380 in 2010 and 25,022 in 2024, a 44.0% growth over 14 years. The peak was 25,022 in 2024. Average annual growth rate: 2.65%.
25,022
Population (2024)
17,380
Population (2010)
25,022
Peak (2024)
2.65%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 17,380 |
| 2011 | 17,774 |
| 2012 | 18,217 |
| 2013 | 19,057 |
| 2014 | 19,496 |
| 2015 | 19,702 |
| 2016 | 21,100 |
| 2017 | 21,547 |
| 2018 | 22,041 |
| 2019 | 22,582 |
| 2020 | 23,992 |
| 2021 | 24,092 |
| 2022 | 24,225 |
| 2023 | 24,598 |
| 2024 | 25,022 |
Race & Ethnicity
| White | 80.4% |
| Black or African American | 8.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.3% |
| Two or More Races | 0.0% |
Economy & Income
$103,430
Median Household Income
$56,641
Per Capita Income
5.3%
Poverty Rate
1.2%
Unemployment Rate
Housing
$346,200
Median Home Value
$1,288
Median Rent
72.3%
Owner-Occupied
Education
97.5%
High School+
57.9%
Bachelor's+
Commute
0.0%
Drive Alone
79.2%
Public Transit
14.5%
Work From Home
19.3 min
Avg Commute
Community Profile
24.0%
Foreign Born
88.2%
Non-English at Home
5.4%
Veterans
7.2%
With Disability
97.8%
Health Insurance
97.4%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 26.7% |
| Information | 18.5% |
| Finance, Insurance & Real Estate | 11.0% |
| Manufacturing | 9.1% |
| Education, Health Care & Social Services | 6.1% |
| Retail Trade | 4.7% |
| Public Administration | 4.0% |
| Construction | 3.3% |
| Arts, Entertainment & Food Services | 2.9% |
| Transportation & Warehousing | 2.8% |
| Agriculture & Mining | 2.1% |
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City rankings
Frequently Asked Questions
Johnston, Iowa has a population of 24,196 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 22nd-largest city in Iowa.
The median household income in Johnston, Iowa is $103,430, with 5.3% of residents living below the federal poverty level.
The median home value in Johnston, Iowa is $346,200, with median monthly rent at $1,288 and a homeownership rate of 72.3%.
The median age in Johnston, Iowa is 38.4 years. The population is 49.1% male and 50.9% female.
The population has grown 44.0% since 2010 (17,380 → 25,022).
Where to stay in Johnston
Visiting or relocating to Johnston, IA? Compare hotels and short-term rentals across the metro — live availability and prices.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.