Rumen Trifonov (Bulgarian: ????? ????????; born 21 February 1985) is a Bulgarian footballer who plays as a defender for Pirin Blagoevgrad.Trifonov earned his first call-up to the Bulgaria national side in March 2011 for the Euro 2012 qualifier against Switzerland and the friendly match versus Cyprus, but did not feature in these games..
On 22 February 2018, Trifonov joined Third League club Spartak Pleven.
In June 2018, he moved to Second League side Montana.