Cemais Uwch Nyfer was a commote in the Dyfed cantref of Cemais. It consisted of the territory between the Afon Nyfer and Fishguard. Its civil headquarters were at Newport. It ceased to be significant at the time of the Acts of Union, its functions being taken over by the Hundred of Cemais. The commote was made part of the Norman March in the 12th century, and had at least eight Norman castles (Newport, Little Newcastle, Puncheston, Castlebythe, Henry's Moat, Maenclochog, Llangolman and Llanfyrnach), but remained Welsh speaking, as it continues today.