White to Non-White Racial Dissimilarity (5-year estimate) Index for San Augustine County, TX was 36.95% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for San Augustine County, TX reached a record high of 52.98 in January of 2010 and a record low of 34.72 in January of 2013. 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 San Augustine County, TX - last updated from the United States Federal Reserve on May of 2024.