How many people live in Posey County, IN?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 25,100 people living in Posey County, IN. That makes Posey County the 61st-most populous county in Indiana. It is home to 0.36% of people living in the state.
25.1K
population of Posey County, IN (2024)
0.36%
County share of the Indiana population (2024)
About 25,100 people lived in Posey County, IN in 2024.
Population estimates, 2000–2024
What are Posey County, IN’s age demographics?
About 5,600 Posey County residents are aged 65 and older in 2024. That represents 22.3% of its population. For comparison, the age group represents 17.5% of Indiana’s population and 18% in the US overall.
Another 5,300 Posey County residents, or 21.2% of the population, were children under 18. For comparison, the age group represents 22.9% of Indiana’s population and 21.6% in the US overall.
A higher share of Posey County, IN's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Posey County, IN’s racial and ethnic demographics?
Non-Hispanic white residents make up 94.8% of the Posey County, IN population, higher than the national share of 57.5%.
In contrast, Posey County’s Hispanic population accounts for 1.6%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 1.2% of the county, compared with 12.6% 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.
Posey County, IN has a higher share of a non-Hispanic white population than Indiana as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Posey County, IN is Mount Vernon with about 6,300 residents in 2024.
Cities and towns in Posey County, IN ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Mount Vernon | 6,341 |
| 2. | Marrs | 5,389 |
| 3. | Robinson | 3,888 |
| 4. | Center | 1,462 |
| 5. | Poseyville | 968 |
| 6. | Lynn | 819 |
| 7. | New Harmony | 686 |
| 8. | Cynthiana | 554 |
| 9. | Point | 329 |
| 10. | Griffin | 142 |
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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.
