De Kalb County, IL - High School Graduate or Higher (5-year estimate) in DeKalb County, IL was 93.00% in January of 2022, according to the United States Federal Reserve. Historically, De Kalb County, IL - High School Graduate or Higher (5-year estimate) in DeKalb County, IL reached a record high of 93.00 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 De Kalb County, IL - High School Graduate or Higher (5-year estimate) in DeKalb County, IL - last updated from the United States Federal Reserve on May of 2024.