Mercer County's 2026 population is estimated at 23,967, reflecting a 0.99% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Mercer County is the 50th largest county in Kentucky. The 2010 population was 21,318 and has grown 12.43% since 2010.
Overall: 42.9 years
Female: 44.3 years
Male: 41.6 years
There are 18,011 adults, (4,363 of whom are seniors) in Mercer County.
Female: 11,320 (49.2%)
Male: 11,708 (50.8%)
The racial composition of Mercer County includes 90.25% White, 3.23% Black or African American, and smaller percentages for other race, Native American, Asian and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 20,783 | 90.25% |
| Two or more races | 949 | 4.12% |
| Black or African American | 743 | 3.23% |
| Other race | 467 | 2.03% |
| Native American | 43 | 0.19% |
| Asian | 43 | 0.19% |
Mercer County 's average per capita income is $44,152. Household income levels show a median of $64,824. The poverty rate stands at 10.66%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $95,530 | - |
| Families | $86,089 | $101,183 |
| Households | $64,824 | $82,091 |
| Non Families | $40,970 | $47,186 |
Average Income
Median Household Income
Poverty Rate