Robert Brown Aderholt is an American politician and attorney serving as the U.S. representative for Alabama's 4th congressional district since 1997. He is a member of the Republican Party. The district includes most of Tuscaloosa County north of the Black Warrior River, as well as Birmingham's far northern suburbs in Walker County and the southern suburbs of Huntsville and Decatur.

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 Franklin, Colbert, Marion, Lamar, Fayette, Walker, Winston, Cullman, Lawrence, Marshall, Etowah, and DeKalb. It also includes parts of Jackson and Tuscaloosa counties, as well as parts of the Decatur Metropolitan Area and the Huntsville-Decatur Combined Statistical Area.