Bryncoch South is an electoral ward of Neath Port Talbot county borough, Wales forming part of the parish of Blaenhonddan.
The ward elects two county councillors to Neath Port Talbot County Borough Council.
Bryncoch South is an almost completely developed ward.
In the 2012 local council elections, the electorate turnout was 37.25%.
While performing her duties as Mayor of Neath Port Talbot in August 2017 she was taken ill and died.