Rik de Voest (born 5 June 1980) is a former professional South African tennis player.

Rik resides in Vancouver, Canada where he pursues a career in real estate.

De Voest qualified for the 2007 Wimbledon Championships where he lost to Marat Safin in the first round.

Playing with Scott Lipsky in men's doubles, he won the Levene Gouldin & Thompson Tennis Challenger in Binghamton, New York in 2009.

In Davis Cup matches for South Africa, de Voest has a win–loss record of 27–19 (18–16 in singles, 9–3 in doubles).