Madison is a city located primarily in Madison County, near the northern border of the U.S. state of Alabama. Madison extends west into neighboring Limestone County. The city is included in the Huntsville Metropolitan Area, the second-largest in the state, and is also included in the merged Huntsville-Decatur Combined Statistical Area. The population was 56,933 at the 2020 census. Madison is bordered by Huntsville on nearly all sides with some small unincorporated lands within Madison in Madison and Limestone counties.