Wontner is a surname. Notable people with the surname include:
Arthur Wontner (1875–1960), English actor Gerald Wontner (1848-1885), British cricketer Hilary Wontner (1912-1984), British actor Hugh Wontner (1908–1992), English hotelier and politician Tom Wontner (born 1971), English actor William Clarke Wontner (1857–1930), English painter