| League: | KHL |
| Team: | HC Budivelnyk |
| Former Teams: | Sokil Kyiv HC Sibir Spartak Moscow CSKA Moscow THK Tver Metallurg Magnitogorsk Salavat Yulaev |
| Position: | Goaltender |
| Shoots: | Left |
| Height Ft: | 6 |
| Height In: | 0.5 |
| Weight Lb: | 190 |
| Ntl Team: | UKR |
| Birth Date: | 26 February 1974 |
| Birth Place: | Kyiv, Ukrainian SSR, Soviet Union |
| Career Start: | 1993 |
| Career End: | 2013 |
Kostiantyn Mykolaiovych "Konstantin" Simchuk (uk|Костянтин Микола́йович Симчук; born February 26, 1974) is a former Ukrainian professional ice hockey goaltender. He was named best goaltender at the B Pool of the 1994 World Junior Ice Hockey Championships held in Bucharest, Romania. Now retired from his professional career, he focuses on coaching.