| Birth Date: | 2 April 1988 |
| Birth Place: | Bangkok, Thailand |
| Strokes: | Breaststroke |
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 competes in the 100 m breaststroke at the 2016 Summer Olympics in Rio de Janeiro.