Denis Sergeyevich Grebeshkov (; born October 11, 1983) is a Russian former professional ice hockey defenceman who last played for Vityaz Podolsk of the Kontinental Hockey League (KHL). He has previously played in the National Hockey League (NHL) for the Los Angeles Kings, New York Islanders, Edmonton Oilers and Nashville Predators, the former of which drafted him in the first round, 18th overall, in the 2002 NHL Entry Draft.