White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Louis County, MO was 57.22% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Louis County, MO reached a record high of 57.94 in January of 2012 and a record low of 57.05 in January of 2014. 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 St. Louis County, MO - last updated from the United States Federal Reserve on May of 2024.