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|Full name||Matthías Vilhjálmsson|
|Date of birth||30 January 1987|
|Place of birth||Ísafjörður, Iceland|
|Height||1.86 m (6 ft 1 in)|
|2011||→ Colchester (loan)||3||(0)|
|2012||→ Start (loan)||30||(18)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 24 August 2017.
‡ National team caps and goals correct as of 28 January 2016
Matthías Vilhjálmsson (born 30 January 1987) is an Icelandic international footballer who plays as a striker for the Icelandic national football team and the Norwegian Premier League club Rosenborg. He can as well play as a midfielder.
Matthías was born in Reykjavík and grew up in Ísafjörður where he played with BÍ until he was 16 years old. He moved to Hafnarfjörður in 2004 to play with FH where he enjoyed early success with the youth teams of FH, winning the cup in 2004 and also the double in 2005, which is the only group in the club who have won the double. Matthías made his first-team debut for FH at the age of 18 in the last match of the 2005 season. He came on as a substitute with 20 minutes were left in the game, after one minute he was awarded a penalty which the team's top goalscorer Tryggvi Guðmundsson converted to complete his hattrick.
Between 2006 and 2010, Matthías won 5 titles with his team, three league titles and two cups. In 2007, he was voted the best young player in the league by other players. The 2009 season also ended with a league title, and he had most assists in the league and was the player with sixth most goals despite playing as a midfielder or right back. In the spring of 2010 he became one of the youngest captains in the history of FH when he was selected as the club captain for the 2010 season by his manager Heimir Guðjónsson. The same season, Matthías was voted the best midfielder in the league by other players in a survey by the most popular football website in Iceland, www.fotbolti.net. The highlight of the season was when FH won the cup 4-0 against their rivals KR where Matthías scored first two goals from the penalty spot before lifting the trophy after the game.
Matthías joined Colchester United on trial in November 2010, He impressed the manager John Ward enough to earn a loan deal to the end of the season with the option of a permanent deal. Matthías made his début as an 83rd-minute substitute in a 2–0 defeat against Brighton where he replaced Dave Mooney.
Ahead of the 2012-season, Matthías joined Norwegian First Division club Start on a season-long loan-deal. He scored 18 goals for the team during the season, and became the top goalscorer in the 2012 Norwegian First Division when Start won promotion to Tippeligaen. Ahead of the 2012-season he joined Start on a permanent deal, and signed a two-year contract with the club.
- Scores and results list Iceland's goal tally first.
|1.||21 March 2010||Kórinn, Kópavogur, Iceland||Faroe Islands||2–0||2–0||Friendly|
|2.||16 January 2015||UCF Soccer and Track Stadium, Orlando, United States||Canada||2–0||2–1||Friendly|
- Icelandic League (3): 2006, 2008, 2009
- Icelandic Cup (2): 2007, 2010
- Icelandic League Cup (3) 2006, 2007, 2009
- Icelandic Super Cup (3) 2007, 2008, 2010
- Norwegian League (2): 2015, 2016 
- Norwegian Football Cup (2): 2015, 2016 
- Mesterfinalen (1): 2017
- Aas, Odd Inge (3 December 2012). "Vilhjalmsson omsider klar for nye Start-år" (in Norwegian). Aftenposten. Retrieved 12 December 2012.
- "Vilhjálmsson klar for Rosenborg - Aftenposten". Aftenposten.no. Retrieved 2016-10-02.
- "Iceland – M. Vilhjálmsson – Profile with news, career statistics and history". soccerway.com. Retrieved September 25, 2016.
- Chris Thomas Skogli (2016-09-24). "Nyheter | Rosenborg". Rbk.no. Archived from the original on 6 October 2016. Retrieved 2016-10-02.
- "Spillerprofiler | Rosenborg". Rbk.no. Retrieved 2016-10-02.