Ryan Rodney Cox (9 April 1979 – 1 August 2007) was a South African professional road racing cyclist. He had been cycling since 1987 and turned professional in 2000. He first joined Amore & Vita–Giubileo 2000–Beretta but changed the following year to Team Cologne which was based in Germany. He had been a member of Team Barloworld since 2003. In 2004 and 2005 he won the South African National Road Race Championships.

Cox died at a Kempton Park hospital when the main artery in his left leg burst, three weeks after a vascular lesion operation in France for a knotted artery.