White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, OR was 27.35% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, OR reached a record high of 29.05 in January of 2021 and a record low of 25.10 in January of 2009. 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 Washington County, OR - last updated from the United States Federal Reserve on May of 2024.