Estimate, Median Age by Sex, Total Population (5-year estimate) in Mills County, TX was 50.80000 Years of Age in January of 2022, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Mills County, TX reached a record high of 52.50000 in January of 2020 and a record low of 45.20000 in January of 2014. 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 Mills County, TX - last updated from the United States Federal Reserve on May of 2024.