White to Non-White Racial Dissimilarity (5-year estimate) Index for Costilla County, CO was 28.01% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Costilla County, CO reached a record high of 39.55 in January of 2019 and a record low of 24.11 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 Costilla County, CO - last updated from the United States Federal Reserve on May of 2024.