The Gulf of Guinea is the northeasternmost part of the tropical Atlantic Ocean, the great bend in Africa's west coast that runs from Cape Palmas in Liberia east and then south to Cape Lopez in Gabon, the limits used by the International Hydrographic Organization. Its shores belong to Liberia, Côte d'Ivoire, Ghana, Togo, Benin, Nigeria, Cameroon, Equatorial Guinea and Gabon, and the island nation of São Tomé and Príncipe sits in its waters. The Niger and the Volta drain into it, its inner coast is split into the Bight of Benin and the Bight of Bonny (also called the Bight of Biafra), and the point where the Equator crosses the Prime Meridian, nicknamed Null Island, lies inside it. It matters because tens of millions of people live along it: canoe fishers, the residents of Lagos, Abidjan and Accra, the oil towns of the Niger Delta and the cocoa farmers of São Tomé, all on a coast whose forts still record its role in the Atlantic slave trade.
Canoe Fishing from Elmina to the Lagos Lagoon
Fishing is one of the oldest livelihoods on the gulf, and much of it is still done from wooden canoes launched off open beaches. In Ghana the marine catch rose from 105,100 tonnes in 1967 to 230,100 tonnes in 1971; the total catch, including 35,000 tonnes from Lake Volta, was 234,100 tonnes in 1982, then reached 302,900 tonnes in 1988 and passed 319,000 tonnes in 1990 before slipping to 289,675 tonnes in 1991. Ghana's Ministry of Fisheries and Aquaculture put the country's seafood exports at more than US$425 million a year in 2025.
For the small boats, the trend since then has been downward. Since 2010 the average yearly income of an artisanal canoe in Ghana has fallen by as much as 40 percent, and 90 percent of small-scale fishers report shrinking catches. Bottom-feeding stocks in Ghana's 200-nautical-mile exclusive economic zone have been severely depleted by large-scale poaching by foreign vessels; a 1992 fisheries law required licences for every vessel and banned the taking of certain shellfish, and a new law signed in 2025 was aimed at protecting local fishers from industrial trawling, with the licences of four Chinese vessels suspended. Fishers also report nets coming up with plastic, sewage and other waste instead of fish.
Across the region the pressure is worse than official figures show. Illegal, unreported and unregulated fishing in the Gulf of Guinea was estimated at 212,800 tonnes in 2000 and 232,200 tonnes in 2012, a rise of 9 percent. The Environmental Justice Foundation has documented forced labour on illegal trawlers, with crews kept at sea for months, sent out in canoes by day and paid partly in boxes of by-catch it calls "trash fish". Depleted stocks also feed piracy: pirate groups often recruit unemployed and underemployed fishers, and some fishers have sold their boats to pirates.
Lagos, Abidjan and Accra: Megacities on the Shore
The gulf's coast holds three of West Africa's largest urban areas, each built where a lagoon or sandbar gave shelter from the Atlantic surf. Lagos, on the barrier islands and creeks at the mouth of Lagos Lagoon, was estimated in November 2025 to have between 17 and 21 million residents, making it the most populous urban area in Africa. With three ports, Apapa, Tin Can Island and the Lekki deep-sea port, the city handles 88 percent of Nigeria's exports, and it is the leading financial centre of West and Central Africa.
Abidjan, on the Ébrié Lagoon in Côte d'Ivoire, had 6.3 million people at the 2021 census, 21.5 percent of the country's population. It grew after a wharf was built in 1931 and became a deep-water port when the Vridi Canal was cut through the coastal sandbar in 1951; although Yamoussoukro became the official capital in 1983, Abidjan remains the seat of government and the economic capital. Accra, Ghana's capital, grew from settlements around three European forts: British Fort James, Dutch Fort Crèvecoeur (Ussher Fort) and Danish Fort Christiansborg. The Greater Accra Region had 5.46 million people at Ghana's 2021 census. You can follow the rest of Ghana's coastal and inland towns in our guide to the largest cities in Ghana.
Oil Under the Niger Delta Since Oloibiri, 1956
Between the two bights the Niger pushes its delta into the gulf. The Nigerian government's official Niger Delta covers about 70,000 km², 7.5 percent of Nigeria's land, and the political region is home to roughly 31 million people from more than 40 ethnic groups, the Ijaw being the largest, alongside the Ibibio, Efik, Urhobo, Ogoni, Isoko, Edo, Igbo and others, speaking around 250 dialects. Before oil it was the "Oil Rivers" for another reason: it was a major exporter of palm oil, and Britain ran it as the Oil Rivers Protectorate from 1885 to 1893.
Crude oil reshaped the region after Shell Darcy found Nigeria's first commercial field at Oloibiri, a creek community in today's Bayelsa State about 72 km east of Port Harcourt, on 15 January 1956. The delta now yields about 2 million barrels a day, and since 1975 it has supplied more than 75 percent of Nigeria's export earnings. The costs have fallen on its people: spills in creeks and farmland, and gas flaring that in 2003 burned about 99 percent of the delta's excess gas, a share that had fallen to 11 percent by 2010. The writer Ken Saro-Wiwa (1941–1995), born in Bori near Port Harcourt, led the Movement for the Survival of the Ogoni People in a non-violent campaign against the damage to Ogoniland. He was hanged by the military government of Sani Abacha in November 1995, and Nigeria was suspended from the Commonwealth for more than three years. The national picture is covered in our article on the economy of Nigeria.
Offshore, the oil frontier has moved west. Ghana's Jubilee field, about 60 km off the Western Region, was discovered in 2007 by Kosmos Energy, developed by Tullow Oil and began producing in 2010 through a floating production vessel named the Kwame Nkrumah.
Forts of the Gold Coast and the Slave Coast, 1471–1850s
Portuguese ships reached what became the Gold Coast in 1471, trading for gold with coastal communities, probably Fante, whose ancestors had long traded gold toward the Mediterranean. In 1482 they built São Jorge da Mina at Elmina, the first European trading post on the gulf and the oldest European building still standing in sub-Saharan Africa. The Dutch West India Company took it in 1637, Britain acquired it with the rest of the Dutch Gold Coast in 1872, and it passed to Ghana at independence in 1957. Cape Coast Castle, begun as a Portuguese post in 1555 and rebuilt in timber by the Swedish Africa Company in 1653, is one of about forty such forts on the Ghanaian coast.
As the trade in captives overtook the trade in gold, these forts held enslaved people before shipment, and the Dutch carried on at Elmina until 1814. Farther east, the stretch between the Volta and the Lagos Lagoon became known in the seventeenth century as the Slave Coast. An estimated two million people were shipped from it, about 16 percent of the roughly 12.5 million Africans carried to the Americas, more than half of them from the open beach south of Ouidah in present-day Benin and many of the rest from Lagos. In the Bight of Biafra, Bonny, Elem Kalabari and Old Calabar together handled over 90 percent of the regional trade. Britain banned its own slave trade in 1807 and sent the Royal Navy to intercept slavers; in 1849 it set up a naval base and consulate on Fernando Po, now Bioko. That history is why UNESCO has inscribed Elmina and the other Ghanaian forts on its World Heritage List.
Bioko, São Tomé and the Cocoa Islands
A chain of volcanic islands, part of the Cameroon Line, runs southwest from the Cameroon coast: Bioko, Príncipe, São Tomé and Annobón. Bioko and Annobón belong to Equatorial Guinea, whose capital Malabo is on Bioko; the mainland part of the country, Río Muni, faces the islands of Corisco and Elobey Grande and Elobey Chico. Our Equatorial Guinea country guide covers the split between island and mainland.
São Tomé and Príncipe were uninhabited when João de Santarém and Pêro Escobar landed on 21 December 1470. Portugal settled them with enslaved Africans to grow sugar, and in the 1530s escaped slaves (maroons) were already raiding plantations. Sugar declined under competition from sugar colonies in the Americas, and the islands became a transit point for slave ships until coffee and cocoa arrived in the early nineteenth century. By 1905 São Tomé was the world's largest cocoa producer, the "Chocolate Islands". At independence in 1975 Portuguese-owned plantations covered 90 percent of the cultivated land; cocoa is still the main crop, about 54 percent of agricultural exports, for a population of 201,800 (2018 official estimate).
Bakassi and the Fishing Grounds Where Two Currents Meet
At the gulf's eastern corner, between the Cross River estuary near Calabar and the Rio del Rey, lies the Bakassi peninsula, a cluster of low mangrove islands of about 665 km². Here the warm, east-flowing Guinea Current (Aya Efiat in Efik) meets the cold Benguela Current (Aya Ubenekang), throwing up shoals rich in fish and shrimp that support most of its 150,000 to 300,000 people. After a ruling by the International Court of Justice, Nigeria handed Bakassi to Cameroon in stages, the last on 14 August 2008, even though the Nigerian Senate had rejected the transfer in 2007. Although often called oil-rich, Bakassi has no confirmed commercially viable oil deposits, even if Sinopec announced new oil and gas finds in the Bakassi region in October 2012.
The waters these communities fish are also among the most dangerous for seafarers. Between 2018 and 2019 the number of crew kidnapped in the gulf rose by 50 percent, and the region accounted for 90 percent of kidnappings at sea worldwide. Reported attacks fell after 2020, but kidnappings continued: in December 2025 pirates seized nine crew from the LPG carrier CGAS Saturn about 93 km off the coast while it was bound for Malabo, and on 10 January 2026 nine more were taken from the fishing vessel IB Fish 7 in Gabonese waters. The 18 states of the region's maritime-security area coordinate through ECOWAS, ECCAS and the Gulf of Guinea Commission. For the fishers, traders and port workers whose living comes from this coast, safer water and fuller nets are the same problem, and the country with the forts of Elmina and Cape Coast is covered in our Ghana country guide.