Alabama's 3rd congressional district is a United States congressional district in Alabama that elects a representative to the United States House of Representatives. It is based in east-central Alabama and encompasses Calhoun, Chambers, Cherokee, Clay, Cleburne, Lee, Macon, Randolph, Russell, St. Clair, Talladega, and Tallapoosa counties, and parts of Chilton County. Cities in the district include Phenix City, Talladega, Tuskegee, and Auburn. Prior to the most recent redistricting cycle, the 3rd district had included parts of the state capital city of Montgomery in Montgomery County.

Calhoun County is a county in the east central part of the U.S. state of Alabama. As of the 2020 census, the population was 116,441. Its county seat is Anniston. It is named in honor of John C. Calhoun, a US Senator from South Carolina.