Civilian Labor Force in Union County, SD was 9123.00000 Persons in December of 2025, according to the United States Federal Reserve. Historically, Civilian Labor Force in Union County, SD reached a record high of 9336.00000 in April of 2023 and a record low of 3130.00000 in January of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for Civilian Labor Force in Union County, SD - last updated from the United States Federal Reserve on April of 2026.