Greg Minnaar (born 13 November 1981) is a South African World Champion mountain bike racer competing in downhill cycling.

Greg first began getting noticed as a world class downhill racer at the age of 17, in 1999, racing select World Cups (including one in his home country of South Africa, in Stellenbosch) on a local shop team, aboard a Kona Stab Dee-Lux bike with a Marzocchi Monster T. fork.

The 2007 season ended on a bittersweet note with a dislocated and fractured shoulder early in his winning World Championship final run, although Greg got back on the bike to salvage a painful 4th-place finish.

In the 2008 World Cup, Minnaar podiumed at every one of the seven events in the series, taking the win at Fort William, Mont-Sainte-Anne and Canberra.

In the 2009 World Cup series, Minnaar took first place at Pietermaritzburg South Africa, Fort William Scotland and Bromont Canada.