Resident Population in Pecos County, TX was 14.62300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Pecos County, TX reached a record high of 17.28900 in January of 1983 and a record low of 13.10000 in January of 1973. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Pecos County, TX - last updated from the United States Federal Reserve on May of 2024.