Sidney Willard (September 19, 1780 – December 6, 1856) was an American academic and politician who served in the Massachusetts House of Representatives, on the Massachusetts Governor's Council and as the second Mayor of Cambridge, Massachusetts.^[2]

Willard was the Librarian of Harvard from 1800 to 1805.^[1] From 1807 to 1831^[1] he was the Hancock Professor of Hebrew and other Oriental Languages at Harvard College.^[2] Willard was elected a Fellow of the American Academy of Arts and Sciences in 1808.^[3]

Willard was the son of Harvard president Joseph Willard and Mary (Sheafe) Willard.^[1][2]

Willard was a member of the Anthology Club, and a founder of The Literary Miscellany, established and edited the American Monthly Review (4 vols., 1832/3), was editor of The Christian Register, contributed to numerous periodicals, and published a Hebrew Grammar (Cambridge, 1817), and Memoirs of Youth and Manhood (2 vols., 1855).^[4]

His son in law, John Bartlett, was an American writer and publisher whose best known work, Bartlett's Familiar Quotations, has been continually revised and reissued for a century after his death.