White to Non-White Racial Dissimilarity (5-year estimate) Index for Cook County, IL was 54.57% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Cook County, IL reached a record high of 59.89 in January of 2009 and a record low of 54.57 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 Cook County, IL - last updated from the United States Federal Reserve on May of 2024.