Butte County's 2026 population is estimated at 10,937, reflecting a 0.21% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Butte County is the 17th largest county in South Dakota. The 2010 population was 10,144 and has grown 7.82% since 2010.
Data after 2023 is projected based on recent change
Overall: 40.2 years
Female: 42.3 years
Male: 39 years
There are 8,029 adults, (2,149 of whom are seniors) in Butte County.
Female: 5,316 (49.8%)
Male: 5,360 (50.2%)
The racial composition of Butte County includes 88.95% White, and smaller percentages for Native American, other race, Asian, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 9,496 | 88.95% |
| Two or more races | 847 | 7.93% |
| Native American | 167 | 1.56% |
| Other race | 100 | 0.94% |
| Asian | 50 | 0.47% |
| Native Hawaiian or Pacific Islander | 16 | 0.15% |
Butte County 's average per capita income is $44,869. Household income levels show a median of $75,652. The poverty rate stands at 8.63%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $109,606 | - |
| Families | $99,450 | $117,235 |
| Households | $75,652 | $96,122 |
| Non Families | $28,040 | $43,099 |
Average Income
Median Household Income
Poverty Rate