Estimate, Median Age by Sex, Total Population (5-year estimate) in Armstrong County, PA was 47.00000 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 Armstrong County, PA reached a record high of 47.00000 in January of 2020 and a record low of 43.80000 in January of 2010. 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 Armstrong County, PA - last updated from the United States Federal Reserve on June of 2024.