Radomyos Matjiur (born April 2, 1988) is a Thai breaststroke swimmer who won a gold medal at the 2013 Southeast Asian Games in the 100 m breaststroke.

He currently holds the Thai records in swimming in the 100 m breaststroke, 100 m individual medley, 200 m individual medley and 4×50 m freestyle relay.

Matjiur also won the 200 m breaststroke final at the Southeast Asian Games in Singapore.

[1] He competed in the 100 m breaststroke at the 2016 Summer Olympics in Rio de Janeiro.

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