Stefan Marius Johansen (born 8 January 1991) is a Norwegian professional footballer who plays as a central midfielder.

He made his first-team debut in 2007, and transferred to Strømsgodset in 2011 where he was one of the key players in the team that finished second in the league in 2012 and won the league-title in 2013.

[7] He joined the first-team squad along with Anders Ågnes Konradsen ahead of the 2007 season and Johansen made his debut for the team in the First Round of the 2007 Norwegian Football Cup against Hammerfest.

Johansen made four appearances in the 2009 season,[2] going on to play regularly for Bodø/Glimt in Adeccoligaen in 2010 and was regarded as one of the biggest talents in Northern Norway.

[13] On 15 January 2014, Johansen sealed a move to Scottish Premiership club Celtic for a transfer fee of £2 million.

[12] Johansen signed a three-and-a-half-year contract with the club, and became the fourth Norwegian to play for Celtic following Harald Brattbakk, Vidar Riseth and Thomas Rogne.

[2] He has later represented Norway at every level up to under-23,[24] and played both matches for the under-21 team when they eliminated France U21 and qualified for the 2013 UEFA European Under-21 Football Championship.

[6] Johansen was part of the Norway side which beat England in the European Under-21 Championships before losing to eventual winners Spain at the semi-final stage.