Tigran L. Petrosian (July 28, 1987 in Yerevan) is an Armenian Grandmaster of chess (2002).
He played on the gold medal winning Armenia team in the 2008 Chess Olympiad and in the World Youth U16 Chess Olympiads of 1999 and 2000. In 2002, he became the U-18 Armenian Champion and in 2004 was second in the U-20 World Championship in India. Petrosian came =3rd in the 68th Armenian Championship (2008).
Other results include: =2nd at Batumi 2003; 1st at Isfahan 2004; 1st at Beirut 2004; =1st at Tehran 2005; =1st at Kish 2005, =1st at Lausanne 2005; =1st at Stepanakert 2005 (B-tournament); 1st at Lyon 2006; =1st at Dubai 2006; =2nd at Chicago 2008; =1st at Wheeling 2008; =1st at Las Vegas 2008.
On the September 2009 FIDE list, Petrosian has an Elo rating of 2663, making him number 70 in the world and Armenia's number four. In 2009, he was awarded the title of "Honoured master of sport of the Republic of Armenia".