Estimate, Median Age by Sex, Total Population (5-year estimate) in McPherson County, SD was 50.90000 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 McPherson County, SD reached a record high of 52.30000 in January of 2016 and a record low of 47.90000 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 McPherson County, SD - last updated from the United States Federal Reserve on May of 2024.