Adams County, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 99th-largest in Iowa
The population of Adams County, Iowa is 3,641 as of the 2023 American Community Survey, making it the 99th-largest county in Iowa. The median household income is $68,828, the median home value is $116,900, and the median age is 46.6.
The population of Adams County has declined 10.4% since 2010 (4,023 → 3,606), a -0.78% annualized rate.
3,641
Population
-0.78%
Annual growth
9
People / sq mi
$68,828
Median Income
$116,900
Median Home Value
Adams County covers 423 sq mi of land at 8.6 people per square mile.
About Adams County, IA
Adams County is a county in Iowa with a population of 3,641. It ranks #99 among counties in Iowa by population. The median age is 46.6, older than the national median. The population is 49.6% male and 50.4% female.
The median household income in Adams County is $68,828, below the US median of $74,580. 3.6% of residents live below the federal poverty level. Home values sit at a median of $116,900, with monthly rent averaging $909. The homeownership rate of 76.7% is higher than the national rate of 64.8%.
Educational attainment in Adams County reflects 24.5% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.7% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 19.6 minutes each way.
Adams County Population History (2010-2024)
The county of Adams County had a population of 4,023 in 2010 and 3,606 in 2024, a -10.4% growth over 14 years. The peak was 4,023 in 2010. Average annual growth rate: -0.77%.
3,606
Population (2024)
4,023
Population (2010)
4,023
Peak (2010)
-0.77%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 4,023 |
| 2011 | 3,994 |
| 2012 | 3,910 |
| 2013 | 3,890 |
| 2014 | 3,874 |
| 2015 | 3,752 |
| 2016 | 3,690 |
| 2017 | 3,655 |
| 2018 | 3,628 |
| 2019 | 3,602 |
| 2020 | 3,710 |
| 2021 | 3,641 |
| 2022 | 3,602 |
| 2023 | 3,553 |
| 2024 | 3,606 |
Race & Ethnicity
| White | 95.4% |
| Black or African American | 0.4% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 3.0% |
| Two or More Races | 0.0% |
Age & Sex
46.6
Median Age
50.4%
Female
49.6%
Male
23.9%
Age 65+
Age Distribution
Children (under 15): 18.1% · Seniors (65+): 23.9%
Income & Poverty
| Median household income | $68,828$-4,319 vs state |
| Mean household income | $97,667 |
| Per-capita income | $41,778 |
| Poverty rate | 3.6%-3.3% vs state |
| Unemployment rate | 1.8% |
| Employment-to-population | 59.5% |
Top Industries by Employment
The largest employment sector in Adams County is professional & business services, accounting for 26.2% of workers.
How residents commute
0.0%
Drive alone
3.6%
Carpool
75.9%
Public transit
9.7%
Work from home
19.6 min
Avg commute
Housing
$116,900$-79,000 vs state
Median home value
$909
Median rent
76.7%
Homeownership rate
1,892
Total housing units
80.9%
Occupied
19.1%
Vacant
23.3%
Renter-occupied
Social & access
95.9%
With health insurance
89.0%
With broadband internet
23.8%
Foreign-born
8.9%
Veterans (18+)
14.9%
With a disability
98.5%
Speak language other than English at home
Education
92.6%
High School+
24.5%
Bachelor's+
Largest cities in Iowa
Other counties in Iowa
Part of Iowa
Metro areas in Iowa
County rankings
Frequently Asked Questions
Adams County, Iowa has a population of 3,641 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 99th-largest county in Iowa. Population density is 9 people per square mile.
The population of Adams County has declined 10.4% since 2010 (4,023 → 3,606), a -0.78% annualized rate.
The median household income in Adams County, Iowa is $68,828, with mean (average) household income of $97,667 and per-capita income of $41,778. 3.6% of residents live below the federal poverty level.
In Adams County, the largest racial and ethnic groups are White (95.4%), Hispanic or Latino (3.0%), Black or African American (0.4%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Adams County, Iowa is 46.6 years. Residents are 50.4% female and 49.6% male.
The median home value in Adams County is $116,900 and median monthly rent is $909. 76.7% of occupied housing units are owner-occupied. The county has 1,892 total housing units, 19.1% of which are vacant.
The largest employment sector in Adams County, Iowa is professional, scientific, and management services, employing 26.2% of workers. The unemployment rate is 1.8%.
Des Moines is among the largest cities associated with Adams County, Iowa, with a population of 212,464.
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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.