In 2021, Buffalo County, SD had a population of 1.97k people with a median age of 25.4 and a median household income of $38,523. Between 2020 and 2021 the population of Buffalo County, SD declined from 2,005 to 1,974, a −1.55% decrease and its median household income grew from $35,000 to $38,523, a 10.1% increase.
The 5 largest ethnic groups in Buffalo County, SD are American Indian & Alaska Native (Non-Hispanic) (77.5%), White (Non-Hispanic) (14%), American Indian & Alaska Native (Hispanic) (6.38%), Two+ (Hispanic) (0.912%), and Other (Non-Hispanic) (0.811%).
None of the households in Buffalo County, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
100% of the residents in Buffalo County, SD are U.S. citizens.
In 2021, the median property value in Buffalo County, SD was $88,300, and the homeownership rate was 48.9%.
Most people in Buffalo County, SD drove alone to work, and the average commute time was 13.9 minutes. The average car ownership in Buffalo County, SD was 2 cars per household.
Buffalo County, SD borders Brule County, SD, Hand County, SD, Hyde County, SD, Jerauld County, SD, and Lyman County, SD.