Marion County's 2026 population is estimated at 19,873, reflecting a 0.06% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Marion County is the 59th largest county in Kentucky. The 2010 population was 19,853 and has grown 0.1% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.4 years
Female: 43 years
Male: 38.9 years
There are 15,049 adults, (3,424 of whom are seniors) in Marion County.
Female: 9,786 (49.6%)
Male: 9,963 (50.4%)
The racial composition of Marion County includes 88.05% White, 7.56% Black or African American, and smaller percentages for Two or more races, other race, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 17,389 | 88.05% |
| Black or African American | 1,493 | 7.56% |
| Two or more races | 493 | 2.5% |
| Other race | 227 | 1.15% |
| Asian | 125 | 0.63% |
| Native American | 22 | 0.11% |
Marion County 's average per capita income is $45,054. Household income levels show a median of $59,627. The poverty rate stands at 16.97%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $82,727 | - |
| Families | $72,617 | $85,433 |
| Households | $59,627 | $72,085 |
| Non Families | $31,867 | $41,764 |
Average Income
Median Household Income
Poverty Rate
