Juan Pierre van Deventer (born 26 March 1983) is a South African middle distance runner, who represented his country at the 2008 Summer Olympics and the 2010 IAAF World Indoor Championships. He won the bronze medal in the 1500 metres at the 2008 African Championships in Athletics. Later that year, he became the first South African man to reach the Olympic 1500 m final at the 2008 Beijing Olympics, where he finished sixth. He has a 1500 m personal best of 3:34.46 and he is also the South African record holder in the 3000 metres with a time of 7:41.06 set in Stockholm in 2008.