White to Non-White Racial Dissimilarity (5-year estimate) Index for Hidalgo County, TX was 44.98% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Hidalgo County, TX reached a record high of 46.50 in January of 2021 and a record low of 37.71 in January of 2009. 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 Hidalgo County, TX - last updated from the United States Federal Reserve on May of 2024.