Clinton County's 2026 population is estimated at 21,630, reflecting a -0.14% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Clinton County is the 53rd largest county in Missouri. The 2010 population was 20,740 and has grown 4.29% since 2010.
Overall: 42 years
Female: 42.1 years
Male: 41.8 years
There are 16,451 adults, (4,049 of whom are seniors) in Clinton County.
Female: 10,621 (49.6%)
Male: 10,793 (50.4%)
The racial composition of Clinton County includes 92.75% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 19,862 | 92.75% |
| Two or more races | 1,107 | 5.17% |
| Other race | 207 | 0.97% |
| Black or African American | 178 | 0.83% |
| Asian | 35 | 0.16% |
| Native American | 25 | 0.12% |
Clinton County 's average per capita income is $48,010. Household income levels show a median of $70,627. The poverty rate stands at 12.3%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $99,025 | - |
| Families | $89,312 | $109,426 |
| Households | $70,627 | $89,325 |
| Non Families | $42,764 | $47,307 |
Average Income
Median Household Income
Poverty Rate