South Halmahera Regency is a regency of North Maluku Province, Indonesia. It lies partly on Halmahera Island and partly on smaller islands to the west and south of Halmahera. It covers a land area of 8,779.32 km2, and at the 2010 Census it had a population of 198,911 people, while the 2020 Census showed that this had risen to 248,395 and the official estimate in mid 2023 was 255,384 The capital lies at the town of Labuha on Bacan Island.

North Maluku is a province of Indonesia. It covers the northern part of the Maluku Islands, bordering the Pacific Ocean to the north, the Halmahera Sea to the east, the Molucca Sea to the west, and the Seram Sea to the south. It shares maritime borders with North Sulawesi, Southeast Sulawesi and Central Sulawesi to the west, Maluku to the south, Southwest Papua to the west, and Palau and the Philippines to the north. The provincial capital is Sofifi on the largest island of Halmahera, while the largest city is the island city of Ternate. The population of North Maluku was 1,038,087 in the 2010 census, making it one of the least-populous provinces in Indonesia, but by the 2020 Census the population had risen to 1,282,937, and the official estimate as at mid 2023 was 1,328,594.