White to Non-White Racial Dissimilarity (5-year estimate) Index for Barnwell County, SC was 28.78% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Barnwell County, SC reached a record high of 32.95 in January of 2015 and a record low of 23.13 in January of 2019. 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 Barnwell County, SC - last updated from the United States Federal Reserve on May of 2024.