Clay County's estimated 2026 population is 14,872 with a growth rate of -1.06% 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 7.53% since that time.
Data after 2023 is projected based on recent change
Overall: 24.9 years
Female: 24.1 years
Male: 26.5 years
There are 12,574 adults, (1,856 of whom are seniors) in Clay County.
Female: 7,625 (50.1%)
Male: 7,594 (49.9%)
The racial composition of Clay County includes 84.98% White, 3.77% Native American, and smaller percentages for Asian, Black or African American, other race, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 12,933 | 84.98% |
| Two or more races | 939 | 6.17% |
| Native American | 574 | 3.77% |
| Asian | 452 | 2.97% |
| Black or African American | 278 | 1.83% |
| Other race | 32 | 0.21% |
| Native Hawaiian or Pacific Islander | 11 | 0.07% |
Clay County's average per capita income is $46,842. Household income levels show a median of $56,850. The poverty rate stands at 19.73%.
Name | Median | Mean |
|---|---|---|
| Married Families | $107,706 | - |
| Families | $99,644 | $118,864 |
| Households | $56,850 | $78,631 |
| Non Families | $31,386 | $41,639 |
Average Income
Median Household Income
Poverty Rate