How many people live in Jennings County, IN?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 27,600 people living in Jennings County, IN. That makes Jennings County the 58th-most populous county in Indiana. It is home to 0.4% of people living in the state.
27.6K
population of Jennings County, IN (2024)
0.4%
County share of the Indiana population (2024)
About 27,600 people lived in Jennings County, IN in 2024.
Population estimates, 2000–2024
What are Jennings County, IN’s age demographics?
About 5,000 Jennings County residents are aged 65 and older in 2024. That represents 18.2% of its population. For comparison, the age group represents 17.5% of Indiana’s population and 18% in the US overall.
Another 6,400 Jennings County residents, or 23% 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 lower share of Jennings County, IN's population is aged 25–44 than the US as a whole.
Population estimates by age group, (2024)
What are Jennings County, IN’s racial and ethnic demographics?
Non-Hispanic white residents make up 93% of the Jennings County, IN population, higher than the national share of 57.5%.
In contrast, Jennings County’s Hispanic population accounts for 3.8%, below the 20% nationwide, and the non-Hispanic Black or African American population makes up 0.86% 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.
Jennings 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 Jennings County, IN is Geneva with about 7,600 residents in 2024.
Cities and towns in Jennings County, IN ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Geneva | 7,587 |
| 2. | North Vernon (pt.) | 6,439 |
| 3. | Spencer | 2,418 |
| 4. | Campbell | 1,132 |
| 5. | Marion | 1,105 |
| 6. | Lovett | 1,050 |
| 7. | Montgomery | 934 |
| 8. | Columbia | 890 |
| 9. | Sand Creek | 848 |
| 10. | Bigger | 650 |
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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.
