Oleg Nikolayevich Grebnev (Russian: ???? ?????????? ???????, born 4 February 1968) is a retired Russian team handball player who competed at the 1992 and 1996 Summer Olympics.
He won a gold medal in 1992 and finished fifth in 1996.
He also won the world title in 1993 and 1997 and a European title in 1996.