South Maluku, also South Moluccas, officially the Republic of South Maluku, is an unrecognised secessionist republic that originally claimed the islands of Ambon, Buru, and Seram, which currently make up the Indonesian province of Maluku.

Ambon Island is part of the Maluku Islands of Indonesia. The island has an area of 743.37 km2 (287.02 sq mi) and is mountainous, well watered, and fertile. Ambon Island consists of two territories: the city of Ambon to the south and various districts (kecamatan) of the Central Maluku Regency to the north. The main city and seaport is Ambon, which is also the capital of Maluku province, while those districts of Maluku Tengah Regency situated on Ambon Island had a 2020 Census population of 128,069. By mid 2023 those populations were estimated to have become 354,052 and 128,754 respectively, resulting in an all-island population of 482,806.