White to Non-White Racial Dissimilarity (5-year estimate) Index for Horry County, SC was 29.73% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Horry County, SC reached a record high of 39.23 in January of 2010 and a record low of 29.73 in January of 2022. 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 Horry County, SC - last updated from the United States Federal Reserve on May of 2024.