Estimate, Median Age by Sex, Total Population (5-year estimate) in Butte County, SD was 40.30000 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 Butte County, SD reached a record high of 41.10000 in January of 2010 and a record low of 39.90000 in January of 2011. 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 Butte County, SD - last updated from the United States Federal Reserve on May of 2024.