Joost van der Westhuizen (born 20 February 1971) is a South African former rugby union player who played as a scrum-half for the national team. He represented South Africa in 89 test matches, scoring 38 tries, and was a member of the victorious South African rugby team at the 1995 World Cup.
Van der Westhuizen spent his entire club career with the Provincial State side the Blue Bulls, from 1993 until 2003, whereupon he retired from playing rugby.