Estimate, Median Age by Sex, Total Population (5-year estimate) in Waller County, TX was 28.70000 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 Waller County, TX reached a record high of 32.30000 in January of 2010 and a record low of 28.70000 in January of 2022. 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 Waller County, TX - last updated from the United States Federal Reserve on May of 2024.