| Welson Sim | |
| Fullname: | Welson Sim Wee Sheng[1] |
| Nationality: | Malaysian |
| Birth Date: | 29 March 1997 |
| Birth Place: | Kuching, Sarawak, Malaysia[2] |
| Height: | 1.810NaN0 |
| Weight: | 700NaN0 |
| Show-Medals: | yes |
| S: | 沈威胜 |
| T: | 沈威勝 |
| P: | Shěn Wēishèng |
Welson Sim Wee Sheng (born 29 March 1997) is a Malaysian professional swimmer. He was the first Malaysian male swimmer to qualify for the men's 400 metre freestyle event at the 2016 Summer Olympics.[3]
Sim was born in Kuching, Sarawak to Lee Ngiat Kim and Sim Ah Tee.[2] [4] He started joining swimming classes at the age of 10 to overcome childhood asthma, and competed in Sarawak's President Cup a year later.[5] [6] By the time he turned 12, he was in the Sarawak state swimming team.[7] Sim attended Batu Lintang National Secondary School, before transferring to Bukit Jalil Sports School during the mid-semester in Form Three.[8]
In March 2021, Sim involved in a motorcycle accident, resulting in a broken arm and had two pins inserted into his left arm.[9]