Mellette County's estimated 2026 population is 1,816 with a growth rate of -0.49% in the past year according to the most recent United States census data. Mellette County is the 58th largest county in South Dakota. The 2010 population was 2,026 and has seen a growth of -10.37% since that time.
Data after 2023 is projected based on recent change
The racial composition of Mellette County includes 62.07% Native American, 31.57% White, and smaller percentages for Native Hawaiian or Pacific Islander, other race, Black or African American and multiracial populations.
Native American (62.07%)
White (31.57%)
Two or more races (5.53%)
Native Hawaiian or Pacific Islander (0.29%)
Other race (0.29%)
Black or African American (0.24%)
Race | Population | Percentage (of total) |
|---|---|---|
| Native American | 1,268 | 62.07% |
| White | 645 | 31.57% |
| Two or more races | 113 | 5.53% |
| Native Hawaiian or Pacific Islander | 6 | 0.29% |
| Other race | 6 | 0.29% |
| Black or African American | 5 | 0.24% |
Married
Widowed
Divorced
Separated
Never Married
Mellette County's average per capita income is $32,439. Household income levels show a median of $51,364. The poverty rate stands at 46.19%.
Name | Median | Mean |
|---|---|---|
| Married Families | $67,841 | - |
| Families | $53,090 | $65,493 |
| Households | $51,364 | $58,700 |
| Non Families | $31,656 | $39,444 |
Average Income
Median Household Income
Poverty Rate