Oleh Olegovych Kroka (also Oleg Kryoka, Ukrainian: ???? ???????? ??????; born January 17, 1987 in Dnipropetrovsk) is an amateur Ukrainian Greco-Roman wrestler, who played for the men's heavyweight category.
Kryoka represented Ukraine at the 2008 Summer Olympics in Beijing, where he competed for the men's 96 kg class.
He lost the qualifying round match to Turkish wrestler and Olympic bronze medalist Mehmet Γzal, with a three-set technical score (2β4, 2β1, 1β1), and a classification point score of 1β3.