White to Non-White Racial Dissimilarity (5-year estimate) Index for Okanogan County, WA was 38.55% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Okanogan County, WA reached a record high of 40.06 in January of 2018 and a record low of 29.12 in January of 2013. 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 Okanogan County, WA - last updated from the United States Federal Reserve on May of 2024.