Nicholas Marthinus van Rensburg (born 24 August 1966) is a South African professional golfer who currently plays on the Sunshine Tour.

He has won on the Sunshine Tour six times between 1989 and 2005.

Van Rensburg was born in Alberton, Gauteng, South Africa.

He currently resides in Pretoria with his wife Elmarie and his children Kristoff and Carmen.

Asian PGA Tour playoff record (1–1)