White to Non-White Racial Dissimilarity (5-year estimate) Index for Hamilton County, IL was 27.58% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Hamilton County, IL reached a record high of 47.77 in January of 2009 and a record low of 7.27 in January of 2020. 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 Hamilton County, IL - last updated from the United States Federal Reserve on May of 2024.