The archipelago consists of: 4 larger volcanic islands frequently fringed by coral reefs; and 30 smaller coral islands.
The islands stretch over more than 50 kilometres (31 mi), and spread over an ocean area of 1,000 square kilometres (390 sq mi), between the Solomon Sea to the north and the Coral Sea to the south. The aggregate land area of the islands is about 262.1 square kilometres (101.2 sq mi), with Basilaki Island being the largest.
The entire archipelago is within the Bwanabwana Rural LLG (Local Level Government), a part of the Samarai-Murua District in Milne Bay Province, southeastern Papua New Guinea. The seat of the Bwanabwana Rural LLG is Samarai, the population center of the Samarai Islands archipelago.[1]