High School Graduate or Higher (5-year estimate) in Union County, SD was 94.50% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Union County, SD reached a record high of 94.50 in January of 2022 and a record low of 91.30 in January of 2016. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Union County, SD - last updated from the United States Federal Reserve on May of 2024.