White to Non-White Racial Dissimilarity (5-year estimate) Index for Martin County, FL was 39.70% 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, FL reached a record high of 50.18 in January of 2013 and a record low of 39.70 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 Martin County, FL - last updated from the United States Federal Reserve on May of 2024.