Estimate, Median Age by Sex, Total Population (5-year estimate) in Brown County, KS was 41.80000 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 Brown County, KS reached a record high of 42.90000 in January of 2016 and a record low of 41.50000 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 Brown County, KS - last updated from the United States Federal Reserve on May of 2024.