John Robert Klem (born 12 February 1943) was an Australian international rugby union player.
Born in Sydney, Klem was of South African descent through his father David, a native of Vereeniging. He attended Balgowlah High School and Hawkesbury Agricultural College.
Klem, a pocked sized scrumâÂÂhalf, was a surprise selection by the Wallabies, having been restricted to Sydney's second division in matches with his college XV. He gained his call up in 1963, to be a reserve five-eighth on their tour of South Africa, behind Phil Hawthorne. After debuting in a fixture against North Eastern Districts, Klem scored a try in his next match, partnering with Ken Catchpole for a win over Rhodesia. The selectors stuck with Hawthorne through the Test series and he finished the tour with nine uncapped appearances.