Leddy is a surname. Notable people with the surname include: Bernard Joseph Leddy (1910–1972), United States federal judge Bruce Leddy, writer, director, and producer currently living in Los Angeles Francis Leddy OC, Ph.D. (1911–1998), Canadian academic and President of the University of Windsor from 1964 to 1978 James P. Leddy (born 1942), Democratic member of the Vermont State Senate, who represented the Chittenden senate district John M. Leddy (1914–1997), official in the United States Department of State, who mainly focused on U.S. trade policy Mary Jo Leddy, CM (born 1946), Canadian writer, speaker, theologian and social activist Nick Leddy (born 1991), American professional ice hockey defenseman, currently playing with the New York Islanders organization Robert Leddy, provincial politician from Alberta, Canada