| Kirill Belyaev | |
| Full Name: | Kirill Nikolayevich Belyaev |
| Nationality: | Russian |
| Strokes: | Open water swimming |
| Birth Date: | 27 August 1997 |
| Show-Medals: | yes |
Kirill Nikolayevich Belyaev (Russian: Кирилл Николаевич Беляев; born 27 August 1997) is a Russian swimmer.
He competed in the 25 km open water event at the 2018 European Aquatics Championships, winning the silver medal.[1] He also won silver at the 2019 World Aquatics Championships in the same competition.