Resident Population in Hemphill County, TX was 3.18900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Hemphill County, TX reached a record high of 6.42700 in January of 1982 and a record low of 3.08400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Hemphill County, TX - last updated from the United States Federal Reserve on May of 2024.