Jim Alan Piper (born 13 August 1981) is a former Olympic breaststroke swimmer from Australia. He swam for Australia at the:
At the 2004 Olympics, he finished 19th in the 100m Breaststroke and was a member of Australia's 9th place Men's 4x100m Medley Relay Team. He also reached and swam in the final heat of the 200 breaststroke, where he was disqualified.
At the 2002 Commonwealth Games he won the 200 Breaststroke. Four years later, at the 2006 Commonwealth Games, he finished third in the event.
At the 2002 Short Course Worlds, he won the 200 breast in a new meet record (2:07.16).
As of 2013, he is a board member of Swimming Western Australia, a state federation of Swimming Australia.