White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Charles County, MO was 22.02% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for St. Charles County, MO reached a record high of 23.72 in January of 2013 and a record low of 17.55 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 St. Charles County, MO - last updated from the United States Federal Reserve on May of 2024.