High School Graduate or Higher (5-year estimate) in Grundy County, IL was 94.00% in January of 2022, according to the United States Federal Reserve. Historically, High School Graduate or Higher (5-year estimate) in Grundy County, IL reached a record high of 94.00 in January of 2022 and a record low of 90.70 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 Grundy County, IL - last updated from the United States Federal Reserve on June of 2024.