Aleš Mertelj (born 22 March 1987) is a retired Slovenian footballer who played as a midfielder.

Mertelj started his career playing for Triglav Kranj and stayed there until he was acquired by Slovenian top division club, Koper.

He played for Koper during the 2008–09 season, making 35 league appearances for the club and scoring three goals in the process.

[3] Mertelj made his international debut for Slovenia on 26 May 2012 in a friendly match against Greece, coming in as a late substitute.

[5] Mertelj was born in Kranj in the northwestern Slovenia and has one brother and one sister.