Denis Aleksandrovich Tumasyan (, ; born 24 April 1985) is a Russian football coach and a former player of Armenian descent who played as a centre-back. He is an assistant coach with FC Chayka Peschanokopskoye.
He made his Russian Premier League debut for FC Torpedo Moscow on 17 March 2006 in a game against FC Tom Tomsk.
On 27 January 2019, FC Ufa announced that Tumasyan was released from his contract by mutual consent to join Armenian club FC Alashkert.
Denis is the older brother of Aleksandr and Sergei Tumasyan and a son of Aleksandr Tumasyan.
Alashkert