Rivers State is the sixth-largest geographic area in Nigeria according to 2006 census data. [1] The state has an indigenously diverse population with major riverine and upland divisions. The dominant tribes are: Ogoni, Kalabari and Ikwerre. [2] representing three dominant Ethno-Linguistic blocs in the State, in no particular order (Ogoni, Ijoid and Igboid). Upland Rivers State covering about 45% is composed mainly of Ogoni and Igbo(id) people. The riverine, including most of the state's towns and villages surrounded by water is moderately inhabited. It covers approximately 39% of the total land mass and is home to several Ethno-Linguistic groups who identity as Ijaw . [3]
This list refers to the various autochthonous ethnic groups residing within Rivers State's boundaries in addition to its upland and riverine areas.