Darmadi (born 1945; as Wong Pek Sen; ) is an Indonesian badminton player from the 60s to 70s.
Darmadi competed at the 1966 Asian Games in Bangkok, Thailand. He managed to bring home two medals; a silver in the men's singles and bronze in the mixed doubles. He and with the men's team also succeeded in bringing Indonesia to conquer Malaysia in the third 1969 Asian Badminton Championships in the Philippines for the first time. He also played in the men's doubles with partner Ang Tjin Siang (later known as Muljadi) and won the French Open in 1966. Partnered with Minarni in the mixed doubles, they won 1967 Singapore and Canada Opens. Darmadi and the Indonesian men's team also succeeded in bringing Indonesia back to the winner of the 1970 Thomas Cup men's team championship after defeating Malaysia in the final.
Men's singles
Mixed's doubles
Men's singles
Men's doubles
Mixed doubles