Njaba is a Local Government Area (LGA) in Imo state, Nigeria. Its headquarters or capital is in Nnenasa.Njaba Local Government Area was created on 4th February, 1991, during the Federal Military Government regime, headed by General Ibrahim Babangida. It was carved out of Isu Local Government area with headquarters at Umundugba. People of Njaba Local Government Area engage in farming and petty trading. Njaba LGA, especially in the Umuaka and Okwudor communities, is almost located in a heavily re-enforced rain forest and valleyed area
The Local Government has a number of sprawling towns namely: Umuaka, Amazano, Isiozi, Ugbelle, Achara, Ibelle, Okwudor, Nkume, Attah, Amucha, and Egwedu. The name NJABA is an acronym formed from the initial letters of Njaba River. A river that originally springs from north-western part of Isu at Isunjaba town, and runs all the way to Oguta and then finally terminates into the famous Oguta Lake.