Estimate, Median Age by Sex, Total Population (5-year estimate) in Juniata County, PA was 42.70000 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 Juniata County, PA reached a record high of 43.20000 in January of 2016 and a record low of 40.20000 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 Juniata County, PA - last updated from the United States Federal Reserve on May of 2024.