Estimate, Median Age by Sex, Total Population (5-year estimate) in Macoupin County, IL was 44.00000 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 Macoupin County, IL reached a record high of 44.00000 in January of 2022 and a record low of 41.20000 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 Macoupin County, IL - last updated from the United States Federal Reserve on May of 2024.