De Kalb County, IL - White to Non-White Racial Dissimilarity (5-year estimate) Index for DeKalb County, IL was 33.35% in January of 2022, according to the United States Federal Reserve. Historically, De Kalb County, IL - White to Non-White Racial Dissimilarity (5-year estimate) Index for DeKalb County, IL reached a record high of 34.13 in January of 2015 and a record low of 29.29 in January of 2012. Trading Economics provides the current actual value, an historical data chart and related indicators for De Kalb County, IL - White to Non-White Racial Dissimilarity (5-year estimate) Index for DeKalb County, IL - last updated from the United States Federal Reserve on May of 2024.