Marvin Compper (born 14 June 1985) is a German footballer who plays as a centre back for Serie A club Fiorentina.
The defender moved during the 2002–03 season from the youth team of the VfB Stuttgart to the amateur team of Borussia Mönchengladbach. In 2005, he got a professional contract. Because of the injuries of both Filip Daems and the national defender Marcell Jansen he became a regular player in the autumn of 2006 in the Bundesliga.
In the first half of the 2007–08 season, Compper played only three games for Borussia Mönchengladbach. Due to this, Compper transferred to TSG 1899 Hoffenheim in January 2008.
In January 2013, he transferred to Fiorentina.
He received his first international cap for Germany on 19 November 2008, against England. This made him the first TSG 1899 Hoffenheim player to be capped by Germany.