Estimate, Median Age by Sex, Total Population (5-year estimate) in Marshall County, AL was 38.80000 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 Marshall County, AL reached a record high of 39.20000 in January of 2020 and a record low of 37.40000 in January of 2009. 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 Marshall County, AL - last updated from the United States Federal Reserve on June of 2024.