Joseph Leonard may refer to:
Joseph Leonard (soldier) (Joseph H. Leonard, 1876–1946), U.S. Marine and recipient of the Congressional Medal of Honor Joseph Leonard (priest) (1877–1964), Irish Vincentian priest Joseph J. Leonard (1876–1962), commissioner of the Boston Police Department Joe Leonard (baseball) (Joseph Howard Leonard, 1894–1920), American baseball player Joe Leonard (Joseph Paul Leonard, 1932–2017), American motorcycle and racecar driver Joseph A. Leonard, American architect, designer of Old Vedanta Society Temple in San Francisco J. H. Leonard (Joseph John Henry Leonard, c. 1863 – 1929), Australian newspaper illustrator
See also