The history of present-day Rivers State is deeply connected to the wider history of the Niger Delta. Before colonial rule, the region contained numerous independent kingdoms, city-states, fishing communities and trading settlements. The area was inhabited by several ethnic groups, including the Ijaw, Ikwerre, Kalabari, Ogoni, Okrika, Ogba, Etche, Ekpeye, Ndoki, Bonny and Opobo peoples.
The waterways of the Niger Delta shaped political organisation, transportation and trade. Rivers and creeks served as major routes connecting inland communities with the Atlantic coast. Fishing, farming, canoe building, salt production and long-distance trade formed important parts of the regional economy.
The Bonny Kingdom became one of the most important trading states in the eastern Niger Delta. Its position along the Atlantic trade routes allowed it to develop extensive commercial links with European merchants. The Opobo Kingdom, founded by Jaja of Opobo in the nineteenth century, also became an important commercial power.
The Kalabari kingdom and communities such as Okrika, Nembe and other riverine settlements participated extensively in regional trade. Inland communities developed their own systems of kingship, village government, age grades, religious institutions and agricultural economies.