White to Non-White Racial Dissimilarity (5-year estimate) Index for Pottawattamie County, IA was 33.91% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Pottawattamie County, IA reached a record high of 38.46 in January of 2017 and a record low of 30.72 in January of 2011. 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 Pottawattamie County, IA - last updated from the United States Federal Reserve on May of 2024.