Leon Hougaard Andreasen (born 23 April 1983) is a Danish former professional footballer who played as a defender or midfielder.

After a stay at the very popular football academy, Hessel Gods Fodboldkostskole in Grenaa, he moved on to the youth team of AGF Aarhus in 1999, where he signed his first contract in 2001.

Due to the injury of Finnish defender Petri Pasanen, Andreasen played 12 of the first 17 league games for Werder Bremen.

He made his debut on 27 January against VfL Bochum, in the defensive midfielder position,[1] and went on to score four goals in his first seven games for Mainz.

[3] Andreasen had limited chances to establish a place at Fulham and therefore left the club for Germany's Hannover 96 in the winter break in 2009.