[1] The peninsula extends to the south-west from mainland Greenland at (71°49′N 54°25′W / 71.817°N 54.417°W / 71.817; -54.417) north of the Uummannaq Fjord system.

Running from the western shore inland to then turn north, Sullua (4x50km) is the main waterway, cutting the peninsula into two parts, northwestern being the smaller.

Parallel Umiiviup Kangerlua (4x8km) and Kangiusap Imaa (3x7km) fjord bays cut into the southeastern shore.

There are several settlements on the islands off the southwestern coast, including Nuugaatsiaq and Illorsuit in the Uummannaq Fjord system.

Rocks and sediments on Nunavik Peninsula are of Cretaceous and Paleocene origin,[4][5] with further layers deposited during the movement of Greenland[4] towards the North Pole.