Oglala Lakota County's 2026 population is estimated at 13,266, reflecting a -0.35% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Oglala Lakota County is the 15th largest county in South Dakota. The 2010 population was 13,636 and has grown -2.71% since 2010.
Data after 2023 is projected based on recent change
Overall: 28.2 years
Female: 29.9 years
Male: 24.7 years
There are 8,714 adults, (1,013 of whom are seniors) in Oglala Lakota County.
Female: 7,024 (52.1%)
Male: 6,467 (47.9%)
The racial composition of Oglala Lakota County includes 91.45% Native American, 7.04% White, and smaller percentages for Two or more races, other race, Black or African American and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 12,337 | 91.45% |
| White | 950 | 7.04% |
| Two or more races | 129 | 0.96% |
| Other race | 66 | 0.49% |
| Black or African American | 9 | 0.07% |
Oglala Lakota County 's average per capita income is $35,818. Household income levels show a median of $41,417. The poverty rate stands at 57.57%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $62,097 | - |
| Households | $41,417 | $54,084 |
| Families | $29,550 | $51,179 |
| Non Families | - | $44,142 |
Average Income
Median Household Income
Poverty Rate