White to Non-White Racial Dissimilarity (5-year estimate) Index for Douglas County, IL was 58.70% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Douglas County, IL reached a record high of 60.46 in January of 2021 and a record low of 35.35 in January of 2011. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Douglas County, IL - last updated from the United States Federal Reserve on May of 2024.