The Banggai Archipelago (Indonesian: Kepulauan Banggai) is a group of islands located at the far eastern end of Central Sulawesi, Indonesia. It makes up a regency (kabupaten) of Central Sulawesi Province of Indonesia, created on 4 October 1999 by splitting the existing Banggai Regency into a residual Banggai Regency situated on the mainland of Sulawesi (capital, Luwuk) and a new Banggai Islands Regency (Kabupaten Banggai Kepulauan) then comprising the entire archipelago (with its capital at Banggai town). On 14 December 2012 a splitting of the Banggai Islands archipelago took place with the removal of the more southerly seven districts (including Banggai Island itself, together with smaller islands to its southwest and southeast) from the 13-year-old regency to form a separate Banggai Laut Regency.

The reduced Banggai Islands Regency thus consists of the main island of Peleng, together with various small offshore islands, of which the largest is Bangkalan Island off the north coast of Peleng. It covers an area of 2,488.79 km and had a population of 109,384 at the 2010 census and 120,142 at the 2020 census; the official population estimate at mid-2023 was 123,420 (comprising 62,461 males and 60,959 females). The archipelago is surrounded by the Banda Sea's Gulf of Tolo (Teluk Tolo), and the Molucca Sea. The Peleng Straits (Selat Peleng) separate Peleng from the mainland of Sulawesi.

The Banggai Islands Regency is divided into twelve districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census and the 2020 Census, together with the official estimates at mid-2023. The table also includes the location of the district headquarters, the numbers of administrative villages (totalling 141 rural desa and 3 urban kelurahan) and of offshore islands in each district, and its postal codes.

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n Census 2010	Pop'n Census 2020	Pop'n Estimate mid 2023	Admin centre	No. of villages	No. of islands	Post codes
72.07.03	Totikum	155.45	9,869	10,473	10,638	Sambiut	11	4	94884
72.07.15	Totikum Selatan (South Totikum)	95.19	8,036	8,499	8,625	Kalumbatan	8	-	94887
72.07.04	Tinangkung	312.60	13,201	17,194	18,534	Salakan	11	52	94885
72.07.11	Tinangkung Selatan (South Tinangkum)	187.89	7,204	7,989	8,220	Mansamat	9	-	94885
72.07.19	Tinangkung Utara (North Tinangkung)	136.65	7,670	8,694	9,002	Batulombo	6	-	94886
72.07.05	Liang	176.19	3,076	8,531	9,736	Liang	16	65	94883
72.07.16	Peling Tengah (Central Peling)	140.00	9,244	10,397	10,741	Patukuki	11	-	94888
72.07.06	Bulagi	275.66	9,529	9,493	9,478	Bulagi Satu	16	2	94882
72.07.09	Bulagi Selatan (South Bulagi)	319.00	9,716	9,713	9,698	Lolantang	20	8	94882
72.07.17	Bulagi Utara (North Bulagi)	318.00	8,890	9,640	9,854	Sambulangan	12	-	94889
72.07.07	Buko	184.84	9,376	9,880	10,022	Tabata	13	21	94881
72.07.18	Buko Selatan (South Buko)	187.32	7,881	8,649	8,872	Lumbi-lumbia	11	-	94880
	Totals	2,488.79	109,384	120,142	123,420		144	224

Notes: (a) including kelurahan of Salakan. (b) including kelurahan of Bulagi (town). (c) including kelurahan of Sabang.

Merpati Nusantara Airlines served the islands from Palu (the capital of Central Sulawesi Province). There is also a bus service via Luwuk and thence by boat or ship to Banggai.

The Banggai Islands is home to the Banggai cardinalfish. This species has an extremely limited geographic range (5,500 km) and small total population size (estimated at 2.4 million). The Banggai cardinalfish is composed of isolated populations concentrated around the shallows of 17 large and 10 small islands within the Banggai Archipelago. It is threatened by extinction due to collection for the aquarium trade.

Salakan has a tropical rainforest climate (Af) with moderate rainfall from August to January and heavy rainfall from February to July.