Denis Yuriiovych Bayev (, born November 3, 1983) is a Ukrainian professional ice hockey defenceman who currently plays for Traktor Chelyabinsk of the Kontinental Hockey League (KHL).
Bayev was born in Konotop, Sumy Oblast, in Ukraine, where his father, Yuri Korneyevich, served in the military. His mother, Tamara, is a teacher of Russian language and Russian literature. His wife is Christina Bayev.