Sunette Stella Viljoen (born 6 October 1983) is a South African sportswoman who has represented her country in both cricket and athletics. In athletics, she competes as a javelin thrower and has won an Olympic silver medal (in 2016) and two Commonwealth Games gold medals (in 2006 and 2010), as well as medals in various other competitions. As a cricketer, she represented the South African national team between 2000 and 2002, including at the 2000 World Cup in New Zealand.