| Nunatakassaup Sermia | |
| Location: | Upernavik Archipelago, Greenland |
| Coords: | 73.25°N -60°W |
| Terminus: | Tasiusaq Bay |
Nunatakassaup Sermia (old spelling: Nunatakavsaup Sermia) is a tidewater glacier in Avannaata municipality on the northwestern shore of Greenland. It drains the Greenland ice sheet southwestwards into Tasiusaq Bay.[1] The glacier front is located to the southeast of the Nunatarsuaq nunatak, and to the north of the Qassersuaq Peninsula.[1] Alanngorsuup Sermia, a sibling glacier to the south, drains the icesheet into the same point at the inner end of Tasiusaq Bay.