Arsuk is a village in the Sermersooq municipality in southwestern Greenland. It had 156 inhabitants in 2010. The name of the settlement means the beloved place in the Greenlandic language. The village is served by the communal all-purpose Pilersuisoq store.
Arsuk is located at the southern end of the Sermersooq municipality, on the coast of Labrador Sea near the mouth of the Arsuk Fjord in the southeast. The coastline of southwestern Greenland turns to the east approximately 30 km (18.6 mi) to the south of the settlement, at the wide mouth of Alanngorsuaq Fjord. The 1,418 m (4,652.2 ft) Kuunnaat mountain rises on the mainland directly to the north of the village.