Takuu, formerly known as Tauu and also known as Takuu Mortlock or Marqueen Islands, is a small, isolated atoll off the east coast of Bougainville in Papua New Guinea. Takuu lies about 250 km to the northeast of Kieta, capital of Bougainville. The atoll consists of about 13 islands to the east and one island to the northwest. Its position is 4°45′S 157°2′E. Takuu Island is the southernmost and largest of the islands on the eastern side of the atoll. In 2019 the estimated resident population was 150.
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