White to Non-White Racial Dissimilarity (5-year estimate) Index for Logan County, IL was 45.99% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Logan County, IL reached a record high of 65.02 in January of 2014 and a record low of 45.99 in January of 2022. 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 Logan County, IL - last updated from the United States Federal Reserve on May of 2024.