5°25′19″S 154°40′22″E / 5.42194°S 154.67278°E
Buka is a town located on the southern coast of Buka Island, in the Autonomous Region of Bougainville, in eastern Papua New Guinea. It is administered under Buka Rural LLG. It is the capital of North Bougainville District and the interim capital of the Autonomous Region of Bougainville. It contains Our Lady of the Assumption Cathedral.
Bougainville (/ˈboʊɡənvɪl/ BOH-gən-vil; Tok Pisin: Bogenvil), officially the Autonomous Region of Bougainville (Tok Pisin: Otonomos Region bilong Bogenvil), is an autonomous region in Papua New Guinea. The largest island is Bougainville Island, while the region also includes Buka Island and a number of outlying islands and atolls. The provisional capital is Buka, on Buka Island.
In 2024, the region had an population of 367,093. The lingua franca of Bougainville is Tok Pisin, while a variety of Austronesian and non-Austronesian languages are also spoken. The region includes several Polynesian outliers where Polynesian languages are spoken. Geographically, the islands of Bougainville and Buka form part of the Solomon Islands archipelago, but they are politically separate from the independent country of Solomon Islands. Historically, Bougainville and Buka, together with the islands of Choiseul, Santa Isabel, the Shortlands, and Ontong Java, which are all now part of the country of Solomon Islands, formed the German Solomon Islands Protectorate, the geographical area later being referred to as the North Solomon Islands.
Buka Island is the second-largest island in the Autonomous Region of Bougainville, in eastern Papua New Guinea. It is in Buka Rural LLG of North Bougainville District, with the Autonomous Region's and district's capital city of Buka on the island.
The island is separated by the narrow Buka Passage from the northwestern coast of Bougainville Island, and has an area of approximately 500 km (190 sq mi). Buka, Bougainville Island and the Tabar Islands and their surrounding waters are identified as being part of the Solomon Archipelago terrestrial ecoregion and marine ecoregion.