Pentre Ifan is the name of an ancient manor in the community and parish of Nevern, Pembrokeshire, Wales. It is 11 miles from Cardigan, Ceredigion, and 3 miles east of Newport, Pembrokeshire. It contains and gives its name to the largest and best preserved neolithic dolmen in Wales. The Pentre Ifan monument is a scheduled monument and one of three Welsh monuments to receive legal protection under the Ancient Monuments Protection Act 1882.