Estimate, Median Age by Sex, Total Population (5-year estimate) in Pecos County, TX was 37.30000 Years of Age in January of 2023, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Pecos County, TX reached a record high of 37.30000 in January of 2023 and a record low of 34.00000 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimate, Median Age by Sex, Total Population (5-year estimate) in Pecos County, TX - last updated from the United States Federal Reserve on September of 2025.