White to Non-White Racial Dissimilarity (5-year estimate) Index for Dorchester County, SC was 29.48% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Dorchester County, SC reached a record high of 29.48 in January of 2022 and a record low of 20.89 in January of 2018. 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 Dorchester County, SC - last updated from the United States Federal Reserve on May of 2024.