Njaba River (also Njaba), in the Niger Delta Basin is a major tributary of Oguta Lake in Nigeria's South East Imo State. With 4.5m mean depth, the river has a shoreline length of 26.5 km and an average specific discharge of about 1700 m3/hour.
Njaba is located within Latitudes 5°44' and 5°47' North and Longitudes 6°49' and 7°03' East in Nigeria's Southeast. The river flows in an almost east-western direction, taking off from Amucha and Ekwe passing through several towns including Awo-Omamma before empting into Oguta Lake. Notable towns and settlements in Njaba river basin include Ogbaku, Izombe, Mgbidi, Oguta, Abiaziem, Awa, Uba-Agwa, Egwe, Umunoha, Orsu-Obodo, Ezzi-Orsu, Awo-Omamma, Umuaka, Ekwe, Okwudor and Eziama.
Njaba River basin is an oil and gas rich sub-region of Niger Delta, Southeastern Nigeria. Some of the oil fields in the river basin include Ossu, Izombe and Njaba operated under ChevronTexaco’s OML 53 and Addax Petroleum's OML 124 both in Izombe. OML 124 contains another undeveloped Njaba 2 well onshore Nigeria discovered December 2008 in the town of Awo-Omamma. According to Addax Petroleum, there are also several identified exploration prospects yet to be drilled and tested around Njaba. Jean Claude Gandur, President and Chief Executive Officer of Addax Petroleum was extremely proud to report the leading Njaba oil discovery. The field has potentials of being one of the company's largest fields in Nigeria as well as capable of developing the economy of the River Basin, Imo and Nigeria when developed. In line with directive of the Federal Government of Nigeria to stop gas flaring by year 2008, a plan has been underway to develop a gas processing plant in the river basin under Izombe Integrated Gas Processing Project.
Njaba is a Local Government Area of Imo State, Nigeria. Its headquarters are in the town of Nneasa.
It has an area of 84 km² and a population of 145,110 at the 2006 census.
The postal code of the area is 474.