Unemployment Rate in Lake County, SD was 2.40% in February of 2024, according to the United States Federal Reserve. Historically, Unemployment Rate in Lake County, SD reached a record high of 7.50 in January of 1992 and a record low of 1.50 in March of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Lake County, SD - last updated from the United States Federal Reserve on May of 2024.