Spencer County's 2026 population is estimated at 21,355, reflecting a 1.26% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Spencer County is the 55th largest county in Kentucky. The 2010 population was 17,167 and has grown 24.4% since 2010.
Data after 2023 is projected based on recent change
Overall: 42.9 years
Female: 42.9 years
Male: 42.9 years
There are 15,643 adults, (3,128 of whom are seniors) in Spencer County.
Female: 9,952 (49.3%)
Male: 10,241 (50.7%)
The racial composition of Spencer County includes 93.28% White, and smaller percentages for Black or African American, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 18,837 | 93.28% |
| Two or more races | 945 | 4.68% |
| Black or African American | 168 | 0.83% |
| Other race | 120 | 0.59% |
| Asian | 108 | 0.53% |
| Native American | 15 | 0.07% |
Spencer County 's average per capita income is $58,047. Household income levels show a median of $102,618. The poverty rate stands at 9.84%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $123,483 | - |
| Families | $112,237 | $126,633 |
| Households | $102,618 | $116,525 |
| Non Families | $48,088 | $67,547 |
Average Income
Median Household Income
Poverty Rate