Resident Population in San Jacinto County, TX was 28.93600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in San Jacinto County, TX reached a record high of 28.93600 in January of 2023 and a record low of 6.70200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in San Jacinto County, TX - last updated from the United States Federal Reserve on May of 2024.