Rivers

Rivers State, in Nigeria's South South zone, was created in 1967, with Port Harcourt, founded by the British colonial administration in 1912, as its capital. It is one of Nigeria's most ethnically diverse and economically significant states, home to the Ikwerre, Ijaw, Ogoni, Etche and other groups. Port Harcourt developed as a colonial port for exporting coal from Enugu and later became central to Nigeria's oil and gas industry, hosting major refineries, petrochemical plants and corporate headquarters. Known as the "Treasure Base of the Nation", Rivers combines a large urban commercial economy in Port Harcourt with extensive riverine and creek communities in its southern local government areas, and has a long history of environmental and political tension linked to oil production, notably among the Ogoni people.

Before colonial rule, the area now forming Rivers State was home to Ijaw city-states along the coast and creeks, including Bonny and Okrika, which built substantial wealth through the transatlantic slave trade and later the palm oil trade with European merchants, alongside Ikwerre, Ogoni, Etche and other inland communities organised through village and clan structures. Port Harcourt was founded by the British colonial government in 1912 as a coal port to export coal mined at Enugu via rail, and it grew rapidly through the 20th century into a major commercial city. Rivers State was created in 1967 as one of the original twelve states from the former Eastern Region, with Port Harcourt as capital. From the 1990s the Ogoni people, led by figures including Ken Saro-Wiwa, campaigned prominently against environmental damage from oil production in Ogoniland, a movement that drew international attention amid state repression.

Rivers State lies within the Niger Delta, with a landscape of mangrove swamp forest and extensive creeks in its southern coastal areas, transitioning to freshwater swamp and lowland rainforest further north around Port Harcourt and Ikwerre communities. The Bonny and New Calabar rivers, among other waterways, cross the state en route to the Atlantic. Rainfall is very heavy, among the highest in Nigeria, with a long wet season. The state's coastal and riverine communities are highly exposed to flooding, as seen in major Niger Delta flood events, and to erosion. Decades of oil and gas extraction, particularly in Ogoniland and other producing areas, have been linked to significant gas flaring and oil spill pollution affecting soil, groundwater and fisheries, issues documented in assessments including a UN Environment Programme study of Ogoniland.

Rivers State is one of Nigeria's principal oil and gas producing states, hosting refineries, petrochemical complexes and the headquarters or operational bases of numerous oil companies in and around Port Harcourt, alongside the Port Harcourt seaport, which handles significant import and export trade. The state's oil-derivation revenue is a major component of its government budget. Beyond hydrocarbons, Port Harcourt has a substantial services, retail, real estate and hospitality sector serving its large urban population and corporate presence. Fishing and farming remain important livelihoods in the state's rural and riverine local government areas, though these have in some areas been affected by pollution linked to oil production. Rivers also functions as a significant transport and logistics hub for the wider Niger Delta.