County · Alabama

Madison County

Madison County is a county located in the north central portion of the U.S. state of Alabama. As of the 2020 Census, the population was 388,153, and according to a 2023 population estimate the county has become the second-most populous county in Alabama after only Jefferson County, home to Birmingham. Its county seat is Huntsville. Since the mid-20th century it has become an area of defense and space research and industry. The county is named in honor of James Madison, fourth President of the United States and the first President to visit the state of Alabama. Madison County covers parts of the former Decatur County. Madison County is included in the Huntsville, Alabama Metropolitan Statistical Area.

Governance bodies

County Commission Primary
governing council

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Reference data (Census of Governments 2022)

Census ID (PID6): 160531
FIPS state: 01
FIPS county: 089
FIPS place: 99089
Census record name: COUNTY OF MADISON
Mailing address: 100 NORTHSIDE SQ, HUNTSVILLE 35801