Tomi Nybäck (born 3 April 1985 in Järvenpää) is a Finnish chess grandmaster and poker player.

[3] He is one of the few players to have a positive lifetime score against former World Champion Magnus Carlsen.

[4] Nybäck tied for first with Shakhriyar Mamedyarov and Mateusz Bartel in the European Under-18 championship of 2002, taking the bronze medal on tiebreak.

[8] In the same year he tied for second with Emanuel Berg at the Najdorf Memorial round-robin tournament (category 15, 2608) in Warsaw.

In 2010, he took part in the Corus B tournament at Wijk aan Zee and scored 5/13.