High School Graduate or Higher (5-year estimate) in Sussex County, DE was 90.10% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Sussex County, DE reached a record high of 90.10 in January of 2022 and a record low of 85.20 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 Sussex County, DE - last updated from the United States Federal Reserve on May of 2024.