White to Non-White Racial Dissimilarity (5-year estimate) Index for Washington County, ID was 23.57% 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, ID reached a record high of 24.60 in January of 2012 and a record low of 14.44 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, ID - last updated from the United States Federal Reserve on May of 2024.