Simon Thern (born 18 September 1992) is a Swedish footballer who plays as a midfielder for IFK Norrköping. He is the son of Jonas Thern, former captain of the Swedish national team.
Thern started his professional career in IFK Värnamo. He was soon signed by Allsvenskan club Helsingborgs IF but was immediately loaned to Värnamo for the entire 2010 season. Thern made his Allsvenskan debut for Helsingborg in the home fixture against Syrianska FC on 22 April 2011. He made his debut in the starting eleven against Djurgårdens IF away on 4 July 2011. In total Thern played 23 matches and scored two goals in his debut season in Helsingborg who won a treble for the 2011 season. On 7 December 2011 Helsingborg announced that Thern had rejected a contract offer from the club and would leave when his contract runs out on 28 March 2012, several media has reported that Thern has signed a contract with Helsingborgs arch rivals Malmö FF.