Estimate, Median Age by Sex, Total Population (5-year estimate) in Starr County, TX was 28.60000 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 Starr County, TX reached a record high of 29.20000 in January of 2014 and a record low of 26.00000 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 Starr County, TX - last updated from the United States Federal Reserve on May of 2024.