John Leonard

• John Leonard (1939–2008), American literary, television, film, and cultural critic
• John Leonard (born 1965), Australian poet
• John Leonard (born 1976), Gaelic footballer
• John Leonard (born 1948), New Zealand sprint canoeist
• Johnny Leonard (1903–1995), Australian rules footballer
• John Leonard , British theatrical sound designer
• John B. Leonard (1864–1945), American civil engineer
• John J. Leonard, American roboticist and professor at MIT
• Jack Leonard (1876–after 1899), English association footballer
• John E. Leonard (1845–1878), United States Representative from Louisiana
• J. William Leonard, director of the Information Security Oversight Office

See also