Estimate, Median Age by Sex, Total Population (5-year estimate) in Neosho County, KS 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 Neosho County, KS reached a record high of 40.50000 in January of 2020 and a record low of 39.70000 in January of 2017. 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 Neosho County, KS - last updated from the United States Federal Reserve on May of 2024.