Kostiantyn Mykolaiovych "Konstantin" Simchuk (Ukrainian: 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.

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