Mengya Sun
- Country
- China
- Club
- Shandong team (Shandong provincial team)
- National team
- China Canoe Sprint
- Born
- 2001-05-03
Sun Mengya is a Chinese canoe sprint paddler (born 2001). She specialises in the C-2 500 m, racing with partner Xu Shixiao. The pair won Olympic gold in the C-2 500 m at both Tokyo 2020 and Paris 2024, setting an Olympic record of 1:52.81 in Paris. She is also a three-time C-2 500 m world champion (2019, 2022, 2023).