Gwaun-Cae-Gurwen is an electoral ward of Neath Port Talbot county borough, Wales.
Gwaun-Cae-Gurwen consists of a built up area to the west and north, surrounded by farmland.
The south eastern part of the ward consists of open moorland.
Gwaun-Cae-Gurwen is bounded by the wards of Quarter Bach of Carmarthenshire to the north; Lower Brynamman and Cwmllynfell to the east; Pontardawe to the south; and Glanamman of Carmarthenshire to the west.
In the 2017 local council elections, the electorate turnout was %.