Delta

Delta State, in Nigeria's South South zone, was created on 27 August 1991 from the former Bendel State, with Asaba as its capital. It is one of Nigeria's most ethnically diverse states, home to the Urhobo, Isoko and Itsekiri peoples in its southern and coastal areas, Ijaw communities in its riverine south, and Anioma Igbo-speaking communities around Asaba and Agbor to the north of the Niger. Delta is a major oil and gas producing state, with Warri and its environs long central to Nigeria's petroleum industry. The state combines an industrial and commercial economy centred on Warri and Asaba with extensive riverine and creek communities dependent on fishing and farming, and it has a diverse religious and cultural landscape reflecting its multiple ethnic groups.

The territory now forming Delta State was historically home to distinct pre-colonial polities, including the Itsekiri Kingdom of Warri, which traded with Portuguese and later British merchants from the 16th century, the Urhobo and Isoko clans organised through village councils, and Anioma Igbo communities north of the Niger with their own town-based governance. Benin's influence extended into parts of the Itsekiri and Urhobo areas historically. Colonial administration incorporated the region into Warri Province within the Southern Provinces. After independence, the area was part of the Mid-Western Region, later Bendel State from 1976, formed with Edo-speaking areas. Delta State was created on 27 August 1991 when Bendel State was split, with Asaba, on the western bank of the Niger, chosen as capital largely to balance the state's northern Anioma communities against the dominant Warri-Sapele axis to the south.

Delta State spans a wide range of terrain from the drier uplands around Asaba in the north to extensive mangrove and freshwater swamp forest in its southern Niger Delta reaches around Warri, Burutu and the Escravos coastline. The River Niger flows through the state before splitting into its delta distributaries, including the Forcados River, on its way to the Atlantic. Rainfall is heavy across the state, with the southern coastal areas among the wettest in Nigeria. The southern riverine local government areas are highly vulnerable to flooding, as demonstrated in major Niger Delta flood events, and to erosion and saltwater intrusion along the coast. Decades of oil and gas activity around Warri and Ughelli have also been linked to gas flaring and oil spill pollution affecting farmland, creeks and fisheries in parts of the state.

Delta State is a major hub of Nigeria's oil and gas industry, with the Warri Refining and Petrochemical Company and numerous oil fields and export terminals located within the state, particularly around Warri, Escravos and Ughelli, generating substantial oil-derivation revenue. Asaba has grown rapidly as an administrative and increasingly commercial and residential centre linked to nearby Onitsha across the Niger Bridge. Agriculture remains significant, with oil palm, rubber, cassava and timber produced across various zones, and fishing sustaining many riverine communities in the south. The state has also invested in industrial parks and infrastructure aimed at diversifying beyond oil, though the economy of its southern communities in particular remains closely tied to the fortunes and environmental footprint of the petroleum sector.