Unemployment Rate in Buffalo County, SD was 4.40% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Buffalo County, SD reached a record high of 18.40 in January of 1997 and a record low of 2.60 in March of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Buffalo County, SD - last updated from the United States Federal Reserve on April of 2026.