White to Non-White Racial Dissimilarity (5-year estimate) Index for Chester County, PA was 35.41% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Chester County, PA reached a record high of 40.62 in January of 2010 and a record low of 34.89 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 Chester County, PA - last updated from the United States Federal Reserve on May of 2024.