White to Non-White Racial Dissimilarity (5-year estimate) Index for Johnson County, TX was 28.35% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Johnson County, TX reached a record high of 32.02 in January of 2019 and a record low of 28.35 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 Johnson County, TX - last updated from the United States Federal Reserve on May of 2024.