Bitung, officially the City of Bitung (Indonesian: Kota Bitung), is a coastal city at the north-eastern edge of the island of Sulawesi in Indonesia. Bitung is located in the province of North Sulawesi (Sulawesi Utara), and faces Lembeh Island (which forms two districts of the city), and the Lembeh Strait, which is known for its colourful marine life, in particular sea slugs. Bitung has a population of 187,932 at the 2010 Census, making it the second most populated city in the province after the capital Manado, rising to 225,134 at the 2020 Census; the official estimate as at mid 2023 was 232,440 (comprising 119,120 males and 113,330 females).

A number of development projects have been completed, or are currently undergoing centring around the city; these include the Bitung Special Economic Zone (SEZ), Manado–Bitung Toll Road, Bitung International Ocean Going Ship Port, and the Makassar-Bitung rail track; which will automatically make the city a gateway to the Pacific region.

The city is divided into eight districts (kecamatan), tabulated below with their areas and their populations at the 2010 Census and the 2020 Census, together with the official estimates of population as at mid 2022. The table also includes the number of administrative villages (urban kelurahan) in each district, and their post codes (kode pos).

Kode Wilayah	Name of District (kecamatan)	Area in km	Pop'n census 2010	Pop'n census 2020	Pop'n estimate mid 2022	No. of villages	Post codes
71.72.02	Madidir	20.83	33,482	36,323	36,292	8	95513 - 95516, 95541
71.72.05	Matuari	33.96	27,180	40,496	43,024	8	95539, 95545 - 95547
71.82.06	Girian	5.17	27,862	38,074	39,780	7	95511, 95542 - 95544
71.72.01	Lembeh Selatan (South Lembeh)	25.53	9,120	10,665	10,812	7	95551 - 95558
71.72.08	Lembeh Utara (North Lembeh)	27.66	8,509	9,525	9,575	10	95551 - 95559
71.72.04	Aertembaga	33.09	28,262	29,994	29,842	10	95521 - 95529
71.72.07	Maesa	9.70	36,007	39,681	39,768	8	95511 & 95512, 95521 - 95523
71.72.03	Ranowulu	157.57	17,230	20,376	20,702	11	95531 - 95538
	Totals	313.51	187,932	225,134	229,795	69	—

Notes: (a) formerly Bitung Tengah (Central Bitung). (b) formerly Bitung Barat (West Bitung). (c) formerly Bitung Selatan (South Bitung); the district includes 15 offshore islands. (d) formerly Bitung Timur (East Bitung). (e) formerly Bitung Utara (North Bitung); the district includes offshore island of Pulau Powteng.

Tangkoko Batuangus Nature Reserve is two hours' drive away from Manado, and one hour from Bitung. Tarsius spectrum can be found easily in the nature reserve.

Bitung was named as one of the country's Special Economic Zones in 2014. Priority sectors in the area are logistics, herbal pharmacy, fish processing and coconut processing. Based on Government Regulation No.32/2014 on Bitung SEZ, it will occupy an area of 534 hectares (1,320 acres). The SEZ is divided into three zones, namely industrial zone, logistics zone, and Export Processing Zone.

On 16 January 2014, local authorities passed responsibility to acquire land for the Manado–Bitung Toll Road to the Public Works Ministry, although the initiation of works after the formality would take some time. The construction of the 39.9 kilometres (24.8 miles) toll road was expected to cost Rp 6.7 trillion (US$ 503 million). It was completed in early 2022, and formally opened on 25 February 2022.

On 28 April 2017, Philippines President Rodrigo Duterte and Indonesia President Joko Widodo inaugurated the Davao-Bitung Roll-on Roll-Off Ferry Service that will allow journey time of just three days between two cities. The original shipping route from Davao City in Mindanao, Philippines, took up to five weeks, because ships first have to sail northwards to Manila, passing through South China Sea and Malaysia waters before it reaches various ports in Indonesia. Under the programme, there are 5 to 10 companies who will use the initial voyage of the Cebu-based Asia Marine Transport Corp.'s M/V Super Shuttle RORO 12 with a 500 TEU capacity. Among the goods to be traded include animal feeds, aqua products, charcoal, coffee beans, construction materials, copra, feed ingredients, fertilisers, food and beverages, fresh fruits, ice cream products, meats, peanuts, poultry (halal), soya, sugar, and synthetics. By 2019, however, the route had ceased operations due to a lack of demand caused by similarities in commodities produced by the two cities.

Bitung has a tropical rainforest climate (Af) with heavy to very heavy rainfall year-round.

• Dani Namangge, footballer

• 2023 Bitung clashes

• Media related to Bitung at Wikimedia Commons
• https://web.archive.org/web/20130808160445/http://BitungTimes.com/