Alabama's 4th congressional district

Alabama's 4th congressional district is a U.S. congressional district in Alabama, which elects a representative to the United States House of Representatives. It encompasses the counties of Lauderdale, Colbert, Franklin, Marion, Lamar, Fayette, Walker, Winston, Cullman, Marshall, DeKalb, and Blount counties. It also includes parts of Lauderdale and Tuscaloosa counties, as well as parts of the Decatur Metropolitan Area and the Huntsville-Decatur Combined Statistical Area.

It is currently represented by Republican Robert Aderholt. In the 2016 presidential election, the district was the only one in the country to give Republican nominee Donald Trump more than 80% of the vote, making it his strongest district in the country. Trump went on to improve on this performance in 2020, winning 81% of the vote, and he further improved on this result in the 2024 where Trump won 83% of the district's votes. With a Cook Partisan Voting Index rating of R+33, it is the most Republican district in both Alabama and the United States, and tied with California's 37th district and New York's 12th district (both of which are D+33) for the ninth most extreme on either side of the political spectrum.