Gwynfi is an electoral ward of Neath Port Talbot county borough, Wales. Gwynfi includes the villages if Abergwynfi and Blaengwynfi. Gwynfi is part of the parish of Glyncorrwg and the parliamentary constituency of Aberavon. Gwynfi is bounded by the wards of: Glyncorrwg to the northwest; Treherbert of Rhondda Cynon Taff to the east; Blaengarw of Bridgend county borough to the south; and Cymmer to the west. The northern part of the ward is covered in woodland whereas the south of the ward comprises open moorland.