Takuu Atoll
| NASA picture of Nukutoa Island | |
| Geography | |
|---|---|
| Location | Pacific Ocean | 
| Coordinates | 4°45′S 156°59′E / 4.750°S 156.983°E | 
| Total islands | 13 | 
| Length | 14.9 km (9.26 mi) | 
| Width | 12.5 km (7.77 mi) | 
| Highest elevation | 2 m (7 ft) | 
| Administration | |
| Autonomous Region | Bougainville | 
| District | North Bougainville | 
| Local-level government | Atolls Rural | 
| Largest settlement | Nukutoa | 
| Demographics | |
| Population | 600 | 
Takuu, formerly known as Tauu and also known as Nukutoa, Mortlock Island, or Marqueen Island, is a small, isolated atoll off the east coast of Bougainville Island in Papua New Guinea.