Monona County, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 85th-largest in Iowa
The population of Monona County, Iowa is 8,619 as of the 2023 American Community Survey, making it the 85th-largest county in Iowa. The median household income is $62,944, the median home value is $122,600, and the median age is 44.7.
The population of Monona County has declined 8.9% since 2010 (9,249 → 8,429), a -0.66% annualized rate.
8,619
Population
-0.66%
Annual growth
12
People / sq mi
$62,944
Median Income
$122,600
Median Home Value
Monona County covers 694 sq mi of land at 12.4 people per square mile.
About Monona County, IA
Monona County is a county in Iowa with a population of 8,619. It ranks #85 among counties in Iowa by population. The median age is 44.7, older than the national median. The population is 48.4% male and 51.6% female.
The median household income in Monona County is $62,944, below the US median of $74,580. 5.8% of residents live below the federal poverty level. Home values sit at a median of $122,600, with monthly rent averaging $795. The homeownership rate of 76.4% is higher than the national rate of 64.8%.
Educational attainment in Monona County reflects 18.7% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.0% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 22.9 minutes each way.
Monona County Population History (2010-2024)
The county of Monona County had a population of 9,249 in 2010 and 8,429 in 2024, a -8.9% growth over 14 years. The peak was 9,249 in 2010. Average annual growth rate: -0.66%.
8,429
Population (2024)
9,249
Population (2010)
9,249
Peak (2010)
-0.66%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,249 |
| 2011 | 9,238 |
| 2012 | 9,090 |
| 2013 | 9,030 |
| 2014 | 8,898 |
| 2015 | 8,865 |
| 2016 | 8,779 |
| 2017 | 8,721 |
| 2018 | 8,649 |
| 2019 | 8,626 |
| 2020 | 8,742 |
| 2021 | 8,595 |
| 2022 | 8,515 |
| 2023 | 8,503 |
| 2024 | 8,429 |
Race & Ethnicity
| White | 94.3% |
| Black or African American | 0.2% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.7% |
| Two or More Races | 0.1% |
Age & Sex
44.7
Median Age
51.6%
Female
48.4%
Male
23.8%
Age 65+
Age Distribution
Children (under 15): 18.1% · Seniors (65+): 23.8%
Income & Poverty
| Median household income | $62,944$-10,203 vs state |
| Mean household income | $76,738 |
| Per-capita income | $34,565 |
| Poverty rate | 5.8%-1.1% vs state |
| Unemployment rate | 1.3% |
| Employment-to-population | 60.3% |
Top Industries by Employment
The largest employment sector in Monona County is professional & business services, accounting for 25.8% of workers.
How residents commute
0.5%
Drive alone
1.6%
Carpool
80.9%
Public transit
9.0%
Work from home
22.9 min
Avg commute
Housing
$122,600$-73,300 vs state
Median home value
$795
Median rent
76.4%
Homeownership rate
4,390
Total housing units
88.6%
Occupied
11.4%
Vacant
23.6%
Renter-occupied
Social & access
96.7%
With health insurance
88.6%
With broadband internet
23.7%
Foreign-born
9.4%
Veterans (18+)
13.8%
With a disability
98.0%
Speak language other than English at home
Education
93.6%
High School+
18.7%
Bachelor's+
Largest cities in Iowa
Other counties in Iowa
Part of Iowa
Metro areas in Iowa
County rankings
Frequently Asked Questions
Monona County, Iowa has a population of 8,619 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 85th-largest county in Iowa. Population density is 12 people per square mile.
The population of Monona County has declined 8.9% since 2010 (9,249 → 8,429), a -0.66% annualized rate.
The median household income in Monona County, Iowa is $62,944, with mean (average) household income of $76,738 and per-capita income of $34,565. 5.8% of residents live below the federal poverty level.
In Monona County, the largest racial and ethnic groups are White (94.3%), Hispanic or Latino (2.7%), Black or African American (0.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Monona County, Iowa is 44.7 years. Residents are 51.6% female and 48.4% male.
The median home value in Monona County is $122,600 and median monthly rent is $795. 76.4% of occupied housing units are owner-occupied. The county has 4,390 total housing units, 11.4% of which are vacant.
The largest employment sector in Monona County, Iowa is professional, scientific, and management services, employing 25.8% of workers. The unemployment rate is 1.3%.
Des Moines is among the largest cities associated with Monona 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.