White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, MD was 37.99% 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, MD reached a record high of 43.26 in January of 2016 and a record low of 35.14 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 Washington County, MD - last updated from the United States Federal Reserve on May of 2024.