Ruslan Olegovich Ponomariov (Ukrainian: ?????´? ???´????? ?????????´?, Ruslan Olehovych Ponomar'ov; born 11 October 1983) is a Ukrainian chess grandmaster.
He was FIDE World Chess Champion from 2002 to 2004.
He won the Ukrainian Chess Championship in 2011.
He was runner-up in the Chess World Cup 2005 and Chess World Cup 2009, while reaching the semi-finals in 2011 and the quarterfinals in 2007.