John Leonard

• Giovanni Leonardi
• J. William Leonard
• Jack Leonard
• John B. Leonard
• John E. Leonard
• John J. Leonard
• John Lennard (disambiguation)
• John Leonard (Gaelic footballer)
• John Leonard (bishop)
• John Leonard (canoeist)
• John Leonard (critic)
• John Leonard (judge)
• John Leonard (poet)
• John Leonard (songwriter)
• John Leonard (sound designer)
• John Leonard, Baron Leonard
• John W. Leonard
• Johnny Leonard