| Uummannaarsuk | |
| Location: | North Atlantic Ocean Southern Greenland |
| Coordinates: | 61.8167°N -46°W |
| Elevation M: | 239 |
| Country: | Greenland |
| Country Admin Divisions Title: | Municipality |
| Country Admin Divisions: | Sermersooq |
| Population: | 0 |
Uummannaarsuk is an uninhabited island in the Sermersooq municipality in southern Greenland.
Uummannaarsuk is a 239 m high island that lies off the southeastern coast of Greenland. It is located off Cape Cort Adelaer, to the NE of Cape Daniel Rantzau,[1] both eastern headlands of an irregularly-shaped coastal island located on the northern side of the mouth of Napasorsuaq Fjord.[2]