Pencaer is a community which covers an area of dispersed settlement in Pembrokeshire, Wales, on the peninsula of Pen Caer and comprises the village of Llanwnda and the smaller settlements of Granston, Llangloffan, St Nicholas (Tremarchog) and Trefasser.

[1] Strumble Head lies within the community, as does part of the Pembrokeshire Coast National Park and a stretch of the Pembrokeshire Coast Path.

Much of the community lies at 100 metres (330 ft) above sea level, and the coastline is largely rock cliff with caves and inshore islands.

It sits on 400 feet (120 m) cliffs overlooking the bay (Pwll Deri in English is Pool of Oaks) to the west and has views of the Pembrokeshire Coast to as far away as St. David's.

[6] Livestock farming predominates, particularly sheep, and cattle for milk production, as well as some cereals and potatoes, though production of early potatoes has all but ceased.