Isak Dawid "Dawie" van der Walt (born 11 February 1983) is a South African professional golfer.

Van der Walt turned professional in 2007 and played on the Sunshine Tour and U.S. mini-tours since 2008.

Van der Walt earned his second win of 2013 at the Nelson Mandela Championship.

Van der Walt made the cut just 11 times in 25 events on the 2015–16 PGA Tour and lost his card, returning to the Web.com for 2017.

1Co-sanctioned by the Sunshine Tour *Note: The 2013 Nelson Mandela Championship was shortened to 54 holes due to rain.