White to Non-White Racial Dissimilarity (5-year estimate) Index for Hamilton County, IA was 37.60% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Hamilton County, IA reached a record high of 42.22 in January of 2021 and a record low of 17.59 in January of 2014. 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 Hamilton County, IA - last updated from the United States Federal Reserve on May of 2024.