How many people live in Louisa County, IA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 10,600 people living in Louisa County, IA. That makes Louisa County the 69th-most populous county in Iowa. It is home to 0.33% of people living in the state.
10.6K
population of Louisa County, IA (2024)
0.33%
County share of the Iowa population (2024)
About 10,600 people lived in Louisa County, IA in 2024.
Population estimates, 2000–2024
What are Louisa County, IA’s age demographics?
About 2,200 Louisa County residents are aged 65 and older in 2024. That represents 21% of its population. For comparison, the age group represents 18.9% of Iowa’s population and 18% in the US overall.
Another 2,200 Louisa County residents, or 21.1% 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 Louisa County, IA's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Louisa County, IA’s racial and ethnic demographics?
Non-Hispanic white residents make up 77.1% of the Louisa County, IA population, higher than the national share of 57.5%.
In contrast, Louisa County’s non-Hispanic Black or African American population accounts for 1.7%, below the 12.6% nationwide, and the non-Hispanic Asian population makes up 2.8% 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.
Louisa 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 Louisa County, IA is Wapello with about 2,000 residents in 2024.
Cities and towns in Louisa County, IA ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Wapello | 2,026 |
| 2. | Columbus Junction | 1,794 |
| 3. | Morning Sun | 702 |
| 4. | Grandview | 431 |
| 5. | Columbus City | 385 |
| 6. | Letts | 358 |
| 7. | Fredonia | 227 |
| 8. | Oakville | 198 |
| 9. | Cotter | 40 |
| 10. | Balance of Louisa County | 4,469 |
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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.
