Estimate, Median Age by Sex, Total Population (5-year estimate) in Miami-Dade County, FL was 40.70000 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 Miami-Dade County, FL reached a record high of 40.80000 in January of 2023 and a record low of 37.20000 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 Miami-Dade County, FL - last updated from the United States Federal Reserve on April of 2026.