Estimate, Median Age by Sex, Total Population (5-year estimate) in Wapello County, IA was 39.40000 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 Wapello County, IA reached a record high of 40.20000 in January of 2011 and a record low of 39.20000 in January of 2021. 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 Wapello County, IA - last updated from the United States Federal Reserve on May of 2024.