John or Jack Leonard may refer to:
- John Leonard (songwriter), early 19th century radical poet and songwriter, probably born in Gateshead
- John Leonard (critic) (1939–2008), American literary, television, film, and cultural critic
- John Leonard (poet) (born 1965), Australian poet
- John Leonard (Gaelic footballer) (born 1976), Gaelic footballer
- John Leonard (canoeist) (born 1948), New Zealand sprint canoeist
- John Leonard (judge) (1926–2002), British judge
- Johnny Leonard (1903–1995), Australian rules footballer
- John B. Leonard (1864–1945), American civil engineer
- John J. Leonard, American roboticist and professor at MIT
- Jack Leonard (footballer) (1876–?), English footballer
- Jack Leonard (hurler) (1873–1938), Irish hurler
- Jack E. Leonard (1910–1973), American comedian and actor
- John E. Leonard (1845–1878), United States Representative from Louisiana
- J. William Leonard, director of the Information Security Oversight Office
- John Leonardi (1541–1609), Catholic saint whose feast day is on 9 October
- John Leonard (bishop) (1829–1908), Irish bishop
- John W. Leonard (1890–1974), US Army general
- John Leonard, Baron Leonard (1909–1983), British Labour Party politician
- John Leonard (ice hockey), (born 1998), American ice hockey player
- John Leonard (architect), English architect
See also
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: