White to Non-White Racial Dissimilarity (5-year estimate) Index for Oklahoma County, OK was 40.23% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Oklahoma County, OK reached a record high of 43.75 in January of 2012 and a record low of 40.23 in January of 2022. 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 Oklahoma County, OK - last updated from the United States Federal Reserve on May of 2024.