Estimate, Median Age by Sex, Total Population (5-year estimate) in Calloway County, KY was 35.90000 Years of Age in January of 2024, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Calloway County, KY reached a record high of 36.30000 in January of 2020 and a record low of 33.40000 in January of 2014. 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 Calloway County, KY - last updated from the United States Federal Reserve on April of 2026.