Abaiang, also known as Apaiang, Apia, and in the past, Charlotte Island, in the Northern Gilbert Islands, is a coral atoll of Kiribati, located in the west-central Pacific Ocean. Abaiang was the island of the first missionary to arrive in the Gilberts, Hiram Bingham II. Abaiang has a population of 5,872 (2020 census). Abaiang Atoll is in the northern Gilberts, located not very far to the north of Tarawa. Abaiang is the fourth most northerly in the Gilberts chain of atolls, with a total land area of . The atoll has a lagoon that provides sheltered anchorage. The main island of Abaiang, Teiro (not to be confused with the small islet of Teirio) has a total land area of extends from the northern village of Takarano to the southern village of Tabontebike. It occupies the complete eastern rim and also encircles the southern part of the atoll, stretching over a distance of some Its width ranges from no more than to more than , averaging . It contains 16 of the 18 villages of the atoll. Two other islets, Riboono and Nuotaea are also inhabited. The remaining islets of Abaiang but Taete, with a land area of are mainly uninhabited, with lack of water and remoteness from the mainland being the main issues. They however are used for fishing, copra cutting and campsites. The islets of Ouba and Teirio have had small motels built on them, with staff travelling from the mainland of Abaiang and from Tarawa when guests are expected. In the southwest of Abaiang there is a channel, the Bingham Channel, which is the basic conjunction between the lagoon and the Pacific. The channel is between the biggest island of Abaiang (in the east) and a very little island in the southwest of Abaiang called Teirio. Global warming has created a problem for Abaiang and Kiribati, among other island groups. Houses in Tebunginako village have been abandoned. As storm surges becoming more frequent and spring tides more forceful, eventually the erosion was so great that the village had to be abandoned. The remains of about 100 thatched homes and a maneabe (community meeting hall) are now up to offshore.