White to Non-White Racial Dissimilarity (5-year estimate) Index for Marion County, SC was 22.89% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Marion County, SC reached a record high of 22.89 in January of 2022 and a record low of 14.14 in January of 2017. 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 Marion County, SC - last updated from the United States Federal Reserve on May of 2024.