Clark County's 2026 population is estimated at 135,485, reflecting a 0.18% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Clark County is the 21st largest county in Ohio. The 2010 population was 138,272 and has grown -2.02% since 2010.
Data after 2023 is projected based on recent change
Overall: 41.2 years
Female: 42.6 years
Male: 39.6 years
There are 104,639 adults, (27,405 of whom are seniors) in Clark County.
Female: 68,848 (50.9%)
Male: 66,310 (49.1%)
The racial composition of Clark County includes 82.39% White, 8.04% Black or African American, and smaller percentages for other race, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 111,360 | 82.39% |
| Black or African American | 10,868 | 8.04% |
| Two or more races | 8,988 | 6.65% |
| Other race | 2,853 | 2.11% |
| Asian | 814 | 0.6% |
| Native American | 156 | 0.12% |
| Native Hawaiian or Pacific Islander | 119 | 0.09% |
Clark County 's average per capita income is $47,046. Household income levels show a median of $63,132. The poverty rate stands at 15.19%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $102,369 | $115,304 |
| Families | $79,932 | $96,312 |
| Households | $63,132 | $80,369 |
| Non Families | $37,278 | $49,228 |
Average Income
Median Household Income
Poverty Rate