White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, RI was 27.67% 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, RI reached a record high of 35.17 in January of 2019 and a record low of 24.68 in January of 2012. 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, RI - last updated from the United States Federal Reserve on May of 2024.