Aba South is a Local Government Area of Abia State, Nigeria. Its headquarters are in the city of Aba. The local government chairwoman of Aba South is Emma Iheoma Emeruwa.

Abia state, found east-central of Nigeria, was administratively created in 1991 from the eastern half of former Imo state.It is bordered by the states of Enugu and Ebonyi to the north, Akwa Ibom to the east and southeast, Rivers to the south and southwest, and Imo and Anambra to the west.

Upon the creation of Abia state in 1991, Aba was divided into two local government areas namely; Aba South and Aba North. Aba south is the main city centre and the heartbeat of Abia State, south-east Nigeria. It is located on the Aba River. Aba is made up of many villages such as; Aba-Ukwu, Eziukwu-Aba, Obuda-Aba, Umuokpoji-Aba and other villages from Ohazu merged due to administrative convenience.

Abia state is mainly inhabited by the Igbo (Ibo) people and is one of the most densely populated areas in Nigeria.

Aba was a traditional market town for the Igbo (Ibo) people of the tropical rainforest before the establishment of a British military post there in 1901. With the construction of the railway circa 1915 from Port Harcourt (36 miles [58 km] southwest), the city became a major collecting point for agricultural produce (especially palm oil and palm kernels).

By the 1930s Aba was a settled urban community, and it is now a large industrial and commercial centre and home to the Aba Mega Mall.