White to Non-White Racial Dissimilarity (5-year estimate) Index for Columbia County, FL was 28.29% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Columbia County, FL reached a record high of 36.12 in January of 2013 and a record low of 28.29 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 Columbia County, FL - last updated from the United States Federal Reserve on May of 2024.