F
- (Carmarthenshire) Ffarmers
- (Gwynedd) Ffridd Uchaf
- (Sir Powys) Fron
- (County of Ceredigion) Ffos-y-ffîn
- (Anglesey) Four Mile Bridge
- (Pembrokeshire) Ford
- (Anglesey) Fryars Bay
- (Sir Powys) Fron
- (County of Ceredigion) Furnace
- (Sir Powys) Forge
- (Carmarthenshire) Four Roads
- (County of Ceredigion) Felinfach
- (County of Flintshire) Ffynnongroyw
- (Caerphilly County Borough) Fleur-de-lis
- (Wrexham) Froncysyllte
- (Vale of Glamorgan) Font-y-gary
- (Gwynedd) Friog
- (County of Ceredigion) Ffostrasol
- (Carmarthenshire) Felindre
- (County of Ceredigion) Ffair-Rhos
- (Sir Powys) Foel
- (Carmarthenshire) Foelgastell
- (Sir Powys) Frank's Bridge
- (County of Ceredigion) Ferwig
- (Sir Powys) Felindre
- (City and County of Swansea) Felindre
- (Gwynedd) Fachwen
- (Gwynedd) Frongoch
- (Carmarthenshire) Five Roads
- (Carmarthenshire) Ffynnon-ddrain