Nikaj-Mërtur is a region of the Gjakova Highlands of Northern Albania whose territory is synonymous with the historic Albanian tribes of Mërturi and Nikaj. The region of Nikaj-Mërtur is located in the south-east of the Albanian Alps, bordering the Dukagjin highlands and within the former Tropojë District. The region represents the southern extension of the Highlands of Gjakova. Nikaj shares the same patrilineal descent with most of the Krasniqi tribe, while Mërturi is direct blood relative to the Berisha, which is why it also called Berisha-Mërturi. In 2014, the region was proclaimed as the Nikaj-Mertur Regional Nature Park.