Clay County's 2026 population is estimated at 269,810, reflecting a 1.21% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Clay County is the 6th largest county in Missouri. The 2010 population was 222,649 and has grown 21.18% since 2010.
Data after 2023 is projected based on recent change
Overall: 37.9 years
Female: 38.8 years
Male: 37 years
There are 197,377 adults, (39,430 of whom are seniors) in Clay County.
Female: 130,428 (50.5%)
Male: 127,694 (49.5%)
The racial composition of Clay County includes 79.18% White, 6.99% 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 | 204,377 | 79.18% |
| Two or more races | 20,197 | 7.82% |
| Black or African American | 18,039 | 6.99% |
| Other race | 7,029 | 2.72% |
| Asian | 6,676 | 2.59% |
| Native American | 1,046 | 0.41% |
| Native Hawaiian or Pacific Islander | 758 | 0.29% |
Clay County 's average per capita income is $56,206. Household income levels show a median of $88,468. The poverty rate stands at 8.47%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $123,635 | $146,389 |
| Families | $108,082 | $130,446 |
| Households | $88,468 | $108,962 |
| Non Families | $48,949 | $63,340 |
Average Income
Median Household Income
Poverty Rate
