The Bukovec Mountains (Slovak: Bukovské vrchy; Hungarian: Ungi-határhegység) is a flysch mountain range in north-eastern Slovakia, part of the Eastern Beskids of the Outer Eastern Carpathians.

It is located in the Prešov Region near the borders with Poland (Bieszczady Mountains) and Ukraine, and adjacent to the Laborec Highlands.

The highest mountain is Kremenec [de; sk; pl] at 1,221 m AMSL.

Original flora and fauna was preserved because of the area's remoteness.

The area is protected by Poloniny National Park.