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
The poverty rate is what most separates Monona County from the typical county: 5.8% of residents live below the federal poverty line, against 12.4% nationally. With 8,619 residents, Monona County is a county in Iowa.
The typical household here earns about $62,944, below the US median of $78,538. Poverty is relatively low for US counties at 5.8%, below the national 12.4%. Homes are comparatively cheap — a median value of $122,600, with typical rent around $795.
Degree attainment is mid-range for US counties: 18.7% of adults hold a four-year degree, below the national 35.0%. About 9.0% of the workforce is home-based, below the national 14.0%, and the average commute runs about 23 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.