Estimate, Median Age by Sex, Total Population (5-year estimate) in Antrim County, MI was 51.50000 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 Antrim County, MI reached a record high of 51.60000 in January of 2020 and a record low of 45.10000 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 Antrim County, MI - last updated from the United States Federal Reserve on May of 2024.