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
Get Johnston's next ACS population data
Subscribe for Population Review updates by email. No spam, unsubscribe anytime.
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% |
Largest cities in Iowa
Largest counties in Iowa
Part of Iowa
Metro areas in Iowa
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).
Johnston city, IA Climate
Johnston city, IA has an average annual temperature of 9.7°C (49°F) and receives about 854 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
9.7°C
Avg Temp
854
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -7° / 19° | 23 mm |
| February | -3° / 26° | 26 mm |
| March | 3° / 38° | 54 mm |
| April | 10° / 50° | 87 mm |
| May | 16° / 62° | 107 mm |
| June | 22° / 71° | 121 mm |
| July | 24° / 76° | 101 mm |
| August | 23° / 73° | 104 mm |
| September | 18° / 65° | 87 mm |
| October | 11° / 53° | 66 mm |
| November | 3° / 37° | 47 mm |
| December | -4° / 24° | 31 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Johnston city, IA
The most comfortable months to visit Johnston city, IA are typically June, August and September, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 30°C high). The coldest is January (near -12°C low). June is usually the wettest month.
Where to stay near Johnston
Visiting or relocating to Johnston, IA? Compare hotels and short-term rentals across the metro — live availability and prices.
Top-rated places to stay near Johnston
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a move to Johnston?
Get relocation and cost-of-living insights for Johnston, IA by email. No spam, unsubscribe anytime.
More from Iowa
Population 212,464
Population 136,859
Population 101,083
Population 85,651
Population 75,264
Full rankings of Iowa cities by population
Statewide data for Iowa
Population, race, income, age, and trends across Iowa
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.