Aba South is a Local Government Area of Abia State, Nigeria. Its headquarters are in the city of Aba. It has an area of 49 km² and a po…Aba South is a Local Government Area of Abia State, Nigeria. Its headquarters are in the city of Aba. It has an area of 49 km² and a population of 423,852 at the 2006 census. The postal code is 450. Aba South, which is primarily a business area, is where the New Market on Ngwa Road is located.