Abijah Mann Jr. (September 24, 1793 – September 6, 1868) was an American politician who served two terms as a U.S. Representative from New York from 1833 to 1837.
Born in Fairfield, New York, Mann attended the common schools.
He was appointed by President Andrew Jackson as Postmaster of Fairfield and served from May 28, 1830, to January 16, 1833.
Mann was elected as a Jacksonian to the 23rd and 24th United States Congresses, holding office from March 4, 1833, to March 3, 1837.
He died in Auburn, New York, September 6, 1868.