Penrhyn-coch (grid reference SN644842) is a small Welsh village, in the community of Trefeurig, Ceredigion, located between the Afon Stewi and Nant Seilo rivers, close to where they merge into the Afon Clarach. The village is approximately 4½ miles (7 km) north-east of Aberystwyth, and is the home to novelist Niall Griffiths.

The village has expanded since the 1970s with several housing estates being built. There are around 480 houses and an estimated population of 1037 (2005). Most of the working population is employed in Aberystwyth or at the nearby Institute of Grassland and Environmental Research.

Facilities
Penrhyn-coch has a range of facilities including a school, post-office, petrol station, social club, football pitch, tennis courts, children's playground, two places of worship (St. John's Church & Horeb Chapel), 3 halls and a nursery. Just outside the village is a Forestry Commission site with walking and picnic facilities.

History
The village of Penrhyn-coch is a recent development; in the 18th century there was no village, the land formed part of the Gogerddan Estate, owned by the Pryse family. The village started to develop at the end of the 18th century, but major growth did not occur until after the break-up of the Gogerddan Estate in the 1940s.

A war memorial to the fallen of both World Wars who came from the village and surrounding area, can be found outside the Post Office. It has been suggested by some that the large block of quartz used for the memorial is an ancient standing stone.

Nearby places of interest include the traditional birthplace of the poet Dafydd ap Gwilym, and the home of the polymath Lewis Morris (1701-1765). The location of these houses is given on an information map across the road from the war memorial.