White to Non-White Racial Dissimilarity (5-year estimate) Index for Martin County, NC was 24.45% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Martin County, NC reached a record high of 33.45 in January of 2016 and a record low of 22.94 in January of 2020. 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 Martin County, NC - last updated from the United States Federal Reserve on May of 2024.