John Francis Leddy, OC (April 16, 1911 – September 17, 1998) was a Canadian academic and President of the University of Windsor from 1964 to 1978. Born in Ottawa, Ontario, he received a B.A. in honours Latin and French from the University of Saskatchewan in 1930 and an M.A. in Latin from the University of Saskatchewan in 1931. After attending the University of Chicago, doing graduate work in Latin and Greek from 1932 to 1933, he was elected a Rhodes Scholar at Oxford University (Exeter College), where he studied Ancient History, graduating Bachelor of Letters (B.Litt.) in 1935 and Doctor of Philosophy (D.Phil.) in 1938.