John William Smit (born 3 April 1978 in Pietersburg, South Africa) is the 50th captain of the South African national rugby union team, the Springboks, and currently playing professionally in England with Saracens. He has played most of his career as a hooker, but played twice for the Springboks off the bench as a prop prior to the South Africa coaching staff's decision to use him as a tighthead prop for the 2008 end of year Tests. On 22 November 2008, he surpassed prop Os du Randt as the most-capped forward in Springboks history. He retired from international rugby following the 2011 Rugby World Cup as the most-capped player in South African history, with 111 appearances.
Smit played his first Springbok game in 2000 at the age of 22, when South Africa beat Canada 51–18 at Basil Kenyon Stadium in East London. Between October 2003 and June 2007, Smit played in a record 46 consecutive Test matches for South Africa, though it was not until 2004, when he was made captain of the squad by then new coach Jake White, that he became a regular member of the starting XV.