White to Non-White Racial Dissimilarity (5-year estimate) Index for Arapahoe County, CO was 38.10% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Arapahoe County, CO reached a record high of 39.19 in January of 2020 and a record low of 36.90 in January of 2009. 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 Arapahoe County, CO - last updated from the United States Federal Reserve on May of 2024.