Resident Population in San Augustine County, TX was 7.83300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in San Augustine County, TX reached a record high of 8.96100 in January of 1981 and a record low of 7.83300 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in San Augustine County, TX - last updated from the United States Federal Reserve on May of 2024.