Denis Epstein (born 2 July 1986) is a German former professional footballer who played as a left winger.

FC Köln II in 2005, playing 31 games for the third division reserve team and scoring three goals.

[2] After another equally successful season (with four goals in 26 appearances), his contract was terminated by mutual consent on 18 June 2010.

In summer 2011, Epstein became the first of Ernesto Valverde's 'unwanted list' at Olympiacos to leave the club, after a year-long loan to Kerkyra.

[10] In the summer of 2020, after hanging up his boots, it was confirmed that Epstein would continue at TSG Balingen, albeit in a different role; he would be the player-coach of the club's U23/reserve team.

[12] On November 20, 2023, it was confirmed that Epstein had been appointed interim head coach of the club's first team until the end of the year.