Nuugaatsiaq (old spelling: Nûgâtsiaq) is a settlement in the Avannaata municipality, in northwestern Greenland, located on an island off the southern coast of Sigguup Nunaa peninsula, in the Uummannaq Fjord basin.

[4][7] As of March 2023, both Nuugaatsiaq and lllorsuit remained abandoned due to the continuing threat of landslide-generated tsunamis.

[10] Before the village's abandonment, Atuarfik Saamu folk school accommodated approximately 12 students ranging from the first to the ninth grade.

Prior to Nuugaatsiaq′s abandonment after the 2017 tsunami, its population had dropped by over 16 percent relative to the 2000 levels, reflecting a general trend in the region.

[11] A November 2015 edition of National Geographic reported about 80 inhabitants, with many houses in the village empty.