White to Non-White Racial Dissimilarity (5-year estimate) Index for Westmoreland County, PA was 39.65% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Westmoreland County, PA reached a record high of 41.84 in January of 2018 and a record low of 38.58 in January of 2021. 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 Westmoreland County, PA - last updated from the United States Federal Reserve on May of 2024.