Qaasuitsup is a new municipality in Greenland, operational from 1 January 2009. As of January 2010 its population is 17,749. The administrative center of the municipality is in Ilulissat (formerly called Jakobshavn). The municipality consists of the former municipalities of western and northern Greenland, each named after the biggest settlement.
The municipality is located in northwestern Greenland. With an area of 660,000 sq. km, it is the largest municipality in the World by area, larger than France at 643,427 sq. km. In the south, it is flanked by the Qeqqata municipality. In the southeast, it is bordered by the Sermersooq municipality, however this border runs north-south (45° West meridian) through the center of the Greenland ice sheet (Kalaallisut: Sermersuaq), and as such is free of traffic. In the east and northeast it is bordered by the Northeast Greenland National Park.