Clay County's 2026 population is estimated at 18,109, reflecting a -0.29% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Clay County is the 49th largest county in Mississippi. The 2010 population was 20,569 and has grown -11.96% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.8 years
Female: 41.4 years
Male: 38.9 years
There are 14,238 adults, (3,634 of whom are seniors) in Clay County.
Female: 9,795 (53.3%)
Male: 8,588 (46.7%)
The racial composition of Clay County includes 60.15% Black or African American, 36.89% White, and smaller percentages for Two or more races, Asian, other race and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 11,058 | 60.15% |
| White | 6,782 | 36.89% |
| Two or more races | 521 | 2.83% |
| Asian | 20 | 0.11% |
| Other race | 2 | 0.01% |
Clay County 's average per capita income is $35,132. Household income levels show a median of $43,125. The poverty rate stands at 20.9%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $70,000 | - |
| Families | $57,589 | $68,456 |
| Households | $43,125 | $63,753 |
| Non Families | $26,136 | $51,261 |
Average Income
Median Household Income
Poverty Rate