James Mann (June 22, 1822, Gorham, Maine – August 26, 1868, New Orleans, Louisiana) was an American politician. He served in the Maine legislature and was elected to the United States House of Representatives for Louisiana's 2nd congressional district, but died just five weeks into his term in Congress.
Mann was a member of the Maine House of Representatives (1849–50) and Maine Senate (1851–53). He was a major in the Union Army during the American Civil War, serving as a paymaster. After the war, he remained in New Orleans as a Treasury agent. He was elected as part of Louisiana's next congressional delegation after the state was readmitted to representation; he took his seat on July 18, 1868, and died on August 26, 1868. See also John Willis Menard.
- James Mann (Louisiana) at the Biographical Directory of the United States Congress
- "Funeral of the Hon. James Mann in New-Orleans", New York Times, August 28, 1868 (subscription required)