| Official Name: | Bryncoch South |
| Unitary Wales: | Neath Port Talbot |
| Lieutenancy Wales: | West Glamorgan |
| Country: | Wales |
| Constituency Westminster: | Neath |
| Constituency Welsh Assembly: | Neath |
| Councillor1: | Jo Hale |
| Party1: | Plaid Cymru |
| Councillor2: | Chris Williams |
| Party2: | Plaid Cymru |
| Population: | 5,273 |
| Population Ref: | (2001 census) |
| Hide Services: | yes |
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 covers some or all of the following areas: Bryncoch, Caewern and Rhydding in the parliamentary constituency of Neath. Bryncoch South is an almost completely developed ward. It is bounded by the wards of Bryncoch North to the north; Cadoxton to the east; Neath North to the southeast; and Dyffryn to the southwest.
In the 2012 local council elections, the electorate turnout was 37.25%. The results were:
| Candidate | Party | Votes | Status | |
|---|---|---|---|---|
| Rob James | Labour | 856 | Labour gain | |
| Janice Dudley | Plaid Cymru | 825 | Plaid Cymru hold | |
| Tony Wyn-Jones | Plaid Cymru | 744 | ||
| Andrew Jenkins | Labour | 703 |
In the 2017 local council elections, the results were:
| Candidate | Party | Votes | Status | |
|---|---|---|---|---|
| Janice Dudley | Plaid Cymru | 848 | Plaid Cymru hold | |
| Chris Williams | Plaid Cymru | 808 | Plaid Cymru gain | |
| Emma Denholm-Hall | Labour | 460 | ||
| Alex Sims | Labour | 393 | ||
| Richard Minshull | Conservative | 366 | ||
| Shadanna Wycherley | Conservative | 290 | ||
| Catrin Brock | Green | 110 | ||
| Frank Little | Liberal Democrats | 102 |
Councillor Dudley has represented the seat since 2004. While performing her duties as Mayor of Neath Port Talbot in August 2017 she was taken ill and died.[1] A by-election was held on 23 November 2017 and the results were:
| Candidate | Party | Votes | Status | |
|---|---|---|---|---|
| Jo Hale | Plaid Cymru | 525 | Plaid Cymru hold | |
| Emma Denholm-Hall | Labour | 306 | ||
| Peter Crocker-Jaques | Conservative | 105 | ||
| Sheila Kingston-Jones | Liberal Democrat | 92 | ||
| Darren Thomas | UKIP | 33 |