Tobias Grahn (born 5 March 1980) is a Swedish professional football midfielder who currently plays for Danish club Gentofte-Vangede IF.
In August 2003, he left Norwegian club Vålerenga and returned to Sweden, signing with Malmö FF. While with Malmo, Grahn made 21 appearances and scored three goals but soon fell out of favor with coach Tom Prahl. As a result, he left the club and returned to Denmark, signing with AGF Aarhus. In his first season with Aarhus, Grahn enjoyed great success appearing in 22 league matches and scoring 8 goals and providing 13 assists as the clubs playmaker. After appearing in 47 league matches and scoring 10 goals in his two seasons at the club, Grahn was sent on loan to Odense BK for the 2006–07 season. Grahn got off to a great start with Odense scoring six goals in 15 league matches and helped the Danish club to an impressive run in the 2006–07 UEFA Cup. As a result, he began to draw interest from clubs in the top leagues in Europe. During the winter transfer period he was sold to Spain's Gimnàstic. On 18 February 2007, Grahn played his first La Liga match for Gimnàstic against Racing de Santander. While with Gimnàstic, he appeared in nine league matches and scored two goals but injuries limited his chances with the club. At the end of the season, Gimnàstic was relegated to the Spanish Second Division, and Grahn was sent on loan to Hertha BSC in Germany.