White to Non-White Racial Dissimilarity (5-year estimate) Index for Ellis County, OK was 1.54% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Ellis County, OK reached a record high of 19.64 in January of 2018 and a record low of 1.08 in January of 2021. 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 Ellis County, OK - last updated from the United States Federal Reserve on May of 2024.