Frederick Fanning Backus (June 15, 1794 Bethlehem, Litchfield County, Connecticut – November 4, 1858 Rochester, Monroe County, New York) was an American physician and politician from New York.
), the first President of Hamilton College, and Mellicent (Deming) Backus (1766–1853).
He was buried at the Mount Hope Cemetery, Rochester.
His sister Wealtha Ann Backus (1800–1819) was the first wife of Abolitionist Gerrit Smith (1797–1874).
Canal Commissioner Henry Fitzhugh (1801–1866) was a brother of Backus's wife Rebecca and of Gerrit Smith's second wife, Ann Carroll Fitzhugh (1805–1879).