Clay County's estimated 2025 population is 15,691 with a growth rate of 0.84% in the past year according to the most recent United States census data. Clay County is the 14th largest county in South Dakota. The 2010 population was 13,830 and has seen a growth of 13.46% since that time.
Data after 2023 is projected based on recent change
The racial composition of Clay County includes 86.74% White, 4% Native American, 3.02% Asian, and smaller percentages for Black or African American, other race, Native Hawaiian or Pacific Islander and multiracial populations.
White
Native American
Two or more races
Asian
Black or African American
Other race
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| White | 13,127 | 86.74% |
| Native American | 605 | 4% |
| Two or more races | 597 | 3.95% |
| Asian | 457 | 3.02% |
| Black or African American | 304 | 2.01% |
| Other race | 30 | 0.2% |
| Native Hawaiian or Pacific Islander | 13 | 0.09% |
Married
Widowed
Divorced
Separated
Never Married
Clay County's average per capita income is $46,501. Household income levels show a median of $58,794. The poverty rate stands at 19.83%.
Name | Median | Mean |
|---|---|---|
| Married Families | $105,756 | - |
| Families | $96,029 | $109,742 |
| Households | $58,794 | $76,464 |
| Non Families | $34,722 | $43,445 |
Average Income
Median Household Income
Poverty Rate