Cass County, Iowa Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 58th-largest in Iowa
The population of Cass County, Iowa is 13,115 as of the 2023 American Community Survey, making it the 58th-largest county in Iowa. The median household income is $61,657, the median home value is $133,300, and the median age is 44.0.
The population of Cass County has declined 6.5% since 2010 (13,927 → 13,024), a -0.48% annualized rate.
13,115
Population
-0.48%
Annual growth
23
People / sq mi
$61,657
Median Income
$133,300
Median Home Value
Cass County covers 564 sq mi of land at 23.2 people per square mile.
About Cass County, IA
Cass County is a county in Iowa with a population of 13,115. It ranks #58 among counties in Iowa by population. The median age is 44.0, older than the national median. The population is 49.6% male and 50.4% female.
The median household income in Cass County is $61,657, below the US median of $74,580. 13.3% of residents live below the federal poverty level. Home values sit at a median of $133,300, with monthly rent averaging $769. The homeownership rate of 72.3% is higher than the national rate of 64.8%.
Educational attainment in Cass County reflects 21.6% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 9.1% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 15.6 minutes each way.
Cass County Population History (2010-2024)
The county of Cass County had a population of 13,927 in 2010 and 13,024 in 2024, a -6.5% growth over 14 years. The peak was 13,927 in 2010. Average annual growth rate: -0.47%.
13,024
Population (2024)
13,927
Population (2010)
13,927
Peak (2010)
-0.47%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 13,927 |
| 2011 | 13,762 |
| 2012 | 13,697 |
| 2013 | 13,569 |
| 2014 | 13,394 |
| 2015 | 13,354 |
| 2016 | 13,198 |
| 2017 | 13,155 |
| 2018 | 12,959 |
| 2019 | 12,822 |
| 2020 | 13,115 |
| 2021 | 13,085 |
| 2022 | 13,125 |
| 2023 | 13,131 |
| 2024 | 13,024 |
Race & Ethnicity
| White | 96.1% |
| Black or African American | 0.9% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.1% |
| Two or More Races | 0.3% |
Age & Sex
44.0
Median Age
50.4%
Female
49.6%
Male
23.1%
Age 65+
Age Distribution
Children (under 15): 18.4% · Seniors (65+): 23.1%
Income & Poverty
| Median household income | $61,657$-11,490 vs state |
| Mean household income | $82,873 |
| Per-capita income | $36,881 |
| Poverty rate | 13.3%+6.4% vs state |
| Unemployment rate | 0.7% |
| Employment-to-population | 63.2% |
Top Industries by Employment
The largest employment sector in Cass County is professional & business services, accounting for 22.7% of workers.
How residents commute
0.1%
Drive alone
4.3%
Carpool
78.8%
Public transit
9.1%
Work from home
15.6 min
Avg commute
Housing
$133,300$-62,600 vs state
Median home value
$769
Median rent
72.3%
Homeownership rate
6,397
Total housing units
90.5%
Occupied
9.5%
Vacant
27.7%
Renter-occupied
Social & access
95.8%
With health insurance
91.3%
With broadband internet
24.7%
Foreign-born
6.6%
Veterans (18+)
14.6%
With a disability
98.4%
Speak language other than English at home
Education
93.0%
High School+
21.6%
Bachelor's+
Largest cities in Iowa
Other counties in Iowa
Part of Iowa
Metro areas in Iowa
County rankings
Frequently Asked Questions
Cass County, Iowa has a population of 13,115 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 58th-largest county in Iowa. Population density is 23 people per square mile.
The population of Cass County has declined 6.5% since 2010 (13,927 → 13,024), a -0.48% annualized rate.
The median household income in Cass County, Iowa is $61,657, with mean (average) household income of $82,873 and per-capita income of $36,881. 13.3% of residents live below the federal poverty level.
In Cass County, the largest racial and ethnic groups are White (96.1%), Hispanic or Latino (1.1%), Black or African American (0.9%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Cass County, Iowa is 44.0 years. Residents are 50.4% female and 49.6% male.
The median home value in Cass County is $133,300 and median monthly rent is $769. 72.3% of occupied housing units are owner-occupied. The county has 6,397 total housing units, 9.5% of which are vacant.
The largest employment sector in Cass County, Iowa is professional, scientific, and management services, employing 22.7% of workers. The unemployment rate is 0.7%.
Des Moines is among the largest cities associated with Cass 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.