John Caldwell Wardrop (born 26 May 1932) is a male former competitive swimmer who represented Great Britain and Scotland.

While Wardrop was competing for Scotland, he won a silver and bronze medal at the 1954 British Empire and Commonwealth Games in Vancouver.

[1] Wardrop attended the University of Michigan, where he swam for the Michigan Wolverines swimming and diving team in National Collegiate Athletic Association (NCAA) and Big Ten Conference competition from 1953 to 1955.

[6][7] He is the twin brother of Bert Wardrop[1] and the pair learned to swim at Motherwell Baths.

They were members of the Motherwell Amateur Swimming & Water Polo Club.