High School Graduate or Higher (5-year estimate) in Marlboro County, SC was 80.40% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Marlboro County, SC reached a record high of 80.40 in January of 2022 and a record low of 67.50 in January of 2010. Trading Economics provides the current actual value, an historical data chart and related indicators for High School Graduate or Higher (5-year estimate) in Marlboro County, SC - last updated from the United States Federal Reserve on May of 2024.