Qeqertarsuaq (meaning "Large Island") is an island in Avannaata municipality, located in the Karrat Fjord in northwestern Greenland. Nearby islands are Illorsuit Island and Upernivik Island.
The island has a settlement called Nuugaatsiaq.
The island has a 1,765-metre-high (5,791 ft) mountain called Snehætten (meaning Snow hat in Danish), an Ultra prominent peak.