John Waddy

John Waddy may refer to:


 * John Waddy (actor) (1751–1814), Irish actor and theatrical manager
 * John Waddy (British Army officer) (1920–2020), officer in the Parachute Regiment during the Second World War, who later became Colonel SAS
 * John Lloyd Waddy (1916–1987), Royal Australian Air Force fighter ace, who later became a Minister of the Crown