Ratthapark Wilairot is a Thai motorcycleroad racer who joined the 250cc World Championship in 2007 as a member of the Thai Honda PTT-SAG team. He competed in the Moto2 World Championship, with a best result of fourth at the 2010 Dutch TT. On 27 December 2013, Wilairot announced an end to his sabbatical by signing with PTR for the 2014 Supersport World Championship season.
Ratthapark Wilairot is the eldest son of Thai veteran racer Christmas Wilairot. He began junior road racing at 5 years old and first won a 50cc motorcross trophy at the age of ten. Ratthapark has a younger brother Ratthapong Wilairot who is competing in the Asia Road Racing Championship SS600 class.
Wilairot's personal relationship is not public.