Alabama Territory's at-large congressional district was the U.S. House of Representatives congressional district for the Alabama Territory to elect a territorial delegate (non-voting) to represent, participate in floor debates, lobby and sit in on committee meetings) in the U.S. House of Representatives, lower chamber of the Congress of the United States, sitting in the United States Capitol on Capitol Hill in the federal national capital city of Washington, D.C..
On March 3, 1817, the Alabama Territory was created. A non-voting delegate was elected at-large beginning January 29, 1818.