White to Non-White Racial Dissimilarity (5-year estimate) Index for Madison County, TX was 37.15% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Madison County, TX reached a record high of 43.29 in January of 2011 and a record low of 32.30 in January of 2021. 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 Madison County, TX - last updated from the United States Federal Reserve on May of 2024.