White to Non-White Racial Dissimilarity (5-year estimate) Index for Dubuque County, IA was 29.77% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Dubuque County, IA reached a record high of 42.81 in January of 2016 and a record low of 28.96 in January of 2020. 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 Dubuque County, IA - last updated from the United States Federal Reserve on May of 2024.