Resident Population in Grayson County, TX was 146.90700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Grayson County, TX reached a record high of 146.90700 in January of 2023 and a record low of 77.00000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Grayson County, TX - last updated from the United States Federal Reserve on May of 2024.