Whetton is a surname. Notable people with the surname include:
Alan Whetton (born 1959), New Zealand rugby union player Gary Whetton (born 1959), British rugby union player Jack Whetton (born 1992), New Zealand rugby union player Jacob Whetton (born 1991), Australian field hockey player John Whetton (born 1941), British middle-distance runner John Whetton Ehninger (1827-1889), American painter and etcher William Whetton (born 1989), New Zealand rugby union player Penny Whetton (1958–2019), Australian climatologist