White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, ME was 20.47% 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, ME reached a record high of 31.98 in January of 2018 and a record low of 18.38 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 Washington County, ME - last updated from the United States Federal Reserve on May of 2024.