Leo Halpin Mahony, AIA, (November 5, 1931 - June 18, 2010), was an American architect who practiced in the mid to late-twentieth-century Connecticut, New York, New Jersey, and Pennsylvania, under his own name as Leo H. Mahony (fl. 1962–1967) and partner in the architectural firm name of Mahony & Zvosec, Architects & Planners, of Princeton, New Jersey from 1967.