Estimate, Median Age by Sex, Total Population (5-year estimate) in Butler County, PA was 43.40000 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 Butler County, PA reached a record high of 43.40000 in January of 2020 and a record low of 40.40000 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 Butler County, PA - last updated from the United States Federal Reserve on May of 2024.