Kiatak
| Native name:  Kiatak (Kujata) | |
|---|---|
| Aerial view of Kiatak Island | |
| Map of Northumberland Island | |
| Geography | |
| Location | Baffin Bay, Greenland | 
| Coordinates | 77°23′N 71°56′W / 77.383°N 71.933°W | 
| Area | 277 km2 (107 sq mi) | 
| Area rank | 26th largest in Greenland | 
| Highest elevation | 1,030 m (3380 ft) | 
| Highest point | Nalungiussaq | 
| Administration | |
| Municipality | Avannaata | 
| Demographics | |
| Population | 0 (2023) | 
| Pop. density | 0/km2 (0/sq mi) | 
| Ethnic groups | none | 
Kiatak or Northumberland Island (Danish: Northumberland Ø), also known as Kujata, is an island off the coast of northern Greenland.