White to Non-White Racial Dissimilarity (5-year estimate) Index for Grimes County, TX was 40.42% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Grimes County, TX reached a record high of 42.96 in January of 2021 and a record low of 32.75 in January of 2018. 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 Grimes County, TX - last updated from the United States Federal Reserve on May of 2024.