Buffalo County's estimated 2025 population is 1,944 with a growth rate of 1.57% in the past year according to the most recent United States census data. Buffalo County is the 58th largest county in South Dakota. The 2010 population was 1,934 and has seen a growth of 0.52% since that time.
Data after 2023 is projected based on recent change
The racial composition of Buffalo County includes 75.01% Native American, 21.68% White, and smaller percentages for Two or more races, other race, Black or African American, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
Native American
White
Two or more races
Other race
Black or African American
Asian
Native Hawaiian or Pacific Islander
Race | Population | Percentage (of total) |
|---|---|---|
| Native American | 1,318 | 75.01% |
| White | 381 | 21.68% |
| Two or more races | 41 | 2.33% |
| Other race | 17 | 0.97% |
| Black or African American | 0 | 0% |
| Asian | 0 | 0% |
| Native Hawaiian or Pacific Islander | 0 | 0% |
Married
Widowed
Divorced
Separated
Never Married
Buffalo County's average per capita income is $35,354. Household income levels show a median of $47,000. The poverty rate stands at 32.49%.
Name | Median | Mean |
|---|---|---|
| Married Families | $83,571 | - |
| Families | $53,681 | $62,863 |
| Households | $47,000 | $54,977 |
| Non Families | $14,926 | $36,808 |
Average Income
Median Household Income
Poverty Rate