Spencer County's 2026 population is estimated at 20,540, reflecting a 0.85% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Spencer County is the 71st largest county in Indiana. The 2010 population was 20,916 and has grown -1.8% since 2010.
Data after 2023 is projected based on recent change
Overall: 44.4 years
Female: 44.9 years
Male: 43.8 years
There are 15,642 adults, (4,116 of whom are seniors) in Spencer County.
Female: 9,687 (48.5%)
Male: 10,268 (51.5%)
The racial composition of Spencer County includes 93.65% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 18,688 | 93.65% |
| Two or more races | 818 | 4.1% |
| Other race | 256 | 1.28% |
| Black or African American | 113 | 0.57% |
| Asian | 49 | 0.25% |
| Native American | 31 | 0.16% |
Spencer County 's average per capita income is $49,486. Household income levels show a median of $74,506. The poverty rate stands at 7.47%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,946 | - |
| Families | $94,291 | $104,406 |
| Households | $74,506 | $88,201 |
| Non Families | $38,333 | $50,756 |
Average Income
Median Household Income
Poverty Rate
