[4] Qullikorsuit Island is located in the north-central part of Upernavik Archipelago, in the group between Kangerlussuaq Icefjord in the south, and Nuussuaq Peninsula in the north.

[4] The latter is an important waterway trail followed by the boats between Upernavik, the only town in the region, and smaller settlements in the north: Nuussuaq and Kullorsuaq.

The neighboring Kittorsaq Island to the northwest is sometimes used as a stopover on the marine route from Nuussuaq to Tasiusaq, and further south to Upernavik.

At 822 m (2,697 ft), the Sullaussartooq mountain is the highest point on the island, with the top of the ridge permanently glaciated.

[4] The coastline of the island is generally undeveloped, despite two distinct peninsulas and shallow, unnamed bays in the south.