Decatur County's 2026 population is estimated at 26,473, reflecting a 0.1% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Decatur County is the 59th largest county in Indiana. The 2010 population was 25,795 and has grown 2.63% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.8 years
Female: 41.2 years
Male: 39.3 years
There are 20,214 adults, (4,797 of whom are seniors) in Decatur County.
Female: 13,184 (49.9%)
Male: 13,238 (50.1%)
The racial composition of Decatur County includes 93.29% White, and smaller percentages for other race, Black or African American, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 24,649 | 93.29% |
| Two or more races | 1,217 | 4.61% |
| Other race | 279 | 1.06% |
| Black or African American | 178 | 0.67% |
| Native American | 77 | 0.29% |
| Asian | 22 | 0.08% |
Decatur County 's average per capita income is $51,038. Household income levels show a median of $69,783. The poverty rate stands at 10.2%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $98,078 | - |
| Families | $88,456 | $110,831 |
| Households | $69,783 | $92,207 |
| Non Families | $37,436 | $48,872 |
Average Income
Median Household Income
Poverty Rate