Skræling is the name the Norse Greenlanders used for the peoples they encountered in North America. In surviving sources, it is first applied to the Thule people, the proto-Inuit group with whom the Norse coexisted in Greenland after about the 13th century. In the sagas, it is also used for the peoples of the region known as Vinland whom the Norse encountered and fought during their expeditions there in the early 11th century.

The Thule or proto-Inuit were the ancestors of all modern Inuit. They developed in coastal Alaska by the year 1000 and expanded eastward across northern Canada, reaching Greenland by the 13th century. In the process, they replaced people of the earlier Dorset culture that had previously inhabited the region. The appellation "Thule" originates from the location of Thule in northwest Greenland, facing Canada, where the archaeological remains of the people were first found at Comer's Midden.