White to Non-White Racial Dissimilarity (5-year estimate) Index for Sumter County, SC was 36.72% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Sumter County, SC reached a record high of 39.28 in January of 2021 and a record low of 31.58 in January of 2016. 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 Sumter County, SC - last updated from the United States Federal Reserve on May of 2024.