Populai Island (also known as Margaret Island) is an island in the Louisiade Archipelago in Milne Bay Province, Papua New Guinea.
Administration.
The island is part of Gotai Ward. it belongs to Bwanabwana Rural Local Level Government Area LLG, Samarai-Murua District, which are in Milne Bay Province.
Geography.
Populai is located Southeast of Sideia Island. 
The island is part of the Sideia group, itself a part of Samarai Islands of the Louisiade Archipelago.
Demographics.
The population of 15 is living in 1 village on the north coast.
References.
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