White to Non-White Racial Dissimilarity (5-year estimate) Index for Marshall County, IL was 32.54% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Marshall County, IL reached a record high of 49.83 in January of 2015 and a record low of 24.26 in January of 2009. 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 Marshall County, IL - last updated from the United States Federal Reserve on May of 2024.