Estimate, Median Age by Sex, Total Population (5-year estimate) in Watonwan County, MN was 41.00000 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 Watonwan County, MN reached a record high of 42.30000 in January of 2010 and a record low of 39.60000 in January of 2013. 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 Watonwan County, MN - last updated from the United States Federal Reserve on May of 2024.