Aaron Hackley, Jr. (May 6, 1783 - December 28, 1868) was a U.S. Representative from New York.Born in Wallingford, Connecticut, Hackley attended the public schools, and graduated from Williams College in 1805. He moved to Herkimer, New York.Hackley was elected county clerk in 1812 and again in 1815. He served as judge advocate in the War of 1812.