How many people live in Clarke County, IA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 9,500 people living in Clarke County, IA. That makes Clarke County the 78th-most populous county in Iowa. It is home to 0.29% of people living in the state.
9.52K
population of Clarke County, IA (2024)
0.29%
County share of the Iowa population (2024)
About 9,500 people lived in Clarke County, IA in 2024.
Population estimates, 2000–2024
What are Clarke County, IA’s age demographics?
About 1,900 Clarke County, IA residents are aged 65 and older in 2024. That represents 19.9% of its population. For comparison, the age group represents 18.9% of Iowa’s population and 18% in the US overall.
Another 2,400 Clarke County residents, or 25.5% of the population, were children under 18. For comparison, the age group represents 22.5% of Iowa’s population and 21.6% in the US overall.
A lower share of Clarke County, IA's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Clarke County, IA’s racial and ethnic demographics?
Non-Hispanic white residents make up 78.2% of the Clarke County, IA population, higher than the national share of 57.5%. Clarke County, IA also has a larger share of people identifying as non-Hispanic Native Hawaiian and other Pacific Islander (0.45%) than the US overall (0.2%).
In contrast, Clarke County’s non-Hispanic Black or African American population accounts for 1.3%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 0.88% of the county, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Clarke County, IA has a higher share of a Hispanic population than Iowa as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Clarke County, IA is Osceola with about 5,600 residents in 2024.
Cities and towns in Clarke County, IA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Osceola | 5,585 |
| 2. | Murray | 609 |
| 3. | Woodburn | 133 |
| 4. | Balance of Clarke County | 3,197 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
