Abijah Mann Jr. (24 September 1793-6 September 1868) was a member of the US House of Representatives (D-NY 16) from 4 March 1833 to 3 March 1837, succeeding Nathan Soule and preceding Arphaxed Loomis. Born in Fairfield, he served as a justice of the peace, as postmaster of Fairfield from 1830 to 1833, in the State Assembly from 1828 to 1830 and in 1838, in Congress, and as an unsuccessful candidate for Attorney General of New York in 1855.