Estimate, Median Age by Sex, Total Population (5-year estimate) in Adair County, MO was 29.00000 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 Adair County, MO reached a record high of 29.10000 in January of 2012 and a record low of 25.70000 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 Adair County, MO - last updated from the United States Federal Reserve on May of 2024.