White to Non-White Racial Dissimilarity (5-year estimate) Index for Rio Grande County, CO was 29.05% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Rio Grande County, CO reached a record high of 41.67 in January of 2015 and a record low of 23.47 in January of 2010. 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 Rio Grande County, CO - last updated from the United States Federal Reserve on May of 2024.