Clay County's estimated 2026 population is 12,741 with a growth rate of -0.41% in the past year according to the most recent United States census data. Clay County is the 80th largest county in Illinois. The 2010 population was 13,822 and has seen a growth of -7.82% since that time.
Data after 2023 is projected based on recent change
Overall: 40.4 years
Female: 40.9 years
Male: 39.8 years
There are 9,941 adults, (2,727 of whom are seniors) in Clay County.
Female: 6,572 (50.4%)
Male: 6,480 (49.6%)
The racial composition of Clay County includes 95.24% White, and smaller percentages for other race, Black or African American, Asian, Native American and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,431 | 95.24% |
| Two or more races | 480 | 3.68% |
| Other race | 60 | 0.46% |
| Black or African American | 38 | 0.29% |
| Asian | 28 | 0.21% |
| Native American | 15 | 0.11% |
Clay County's average per capita income is $42,390. Household income levels show a median of $60,417. The poverty rate stands at 17.51%.
Name | Median | Mean |
|---|---|---|
| Married Families | $88,895 | - |
| Families | $73,880 | $96,640 |
| Households | $60,417 | $78,529 |
| Non Families | $32,258 | $42,441 |
Average Income
Median Household Income
Poverty Rate