Pentrefelin is the name of several places in Wales:
Pentrefelin, Anglesey Pentrefelin, Carmarthenshire Pentrefelin, Ceredigion Pentrefelin, Conwy Pentrefelin, Denbighshire Pentrefelin, Gwynedd Pentrefelin, Powys, two miles south-east of Llanrhaeadr-ym-Mochnant, location of the now closed Pentrefelin railway station