| Country: | Wales |
| Static Image: | Former council houses, Llanychaer - geograph.org.uk - 332754.jpg |
| Coordinates: | 51.97°N -4.94°W |
| Official Name: | Llanychaer |
| Community Wales: | Cwm Gwaun |
| Unitary Wales: | Pembrokeshire |
| Constituency Westminster: | Preseli Pembrokeshire |
| Constituency Welsh Assembly: | Preseli Pembrokeshire |
| Post Town: | Fishguard |
| Os Grid Reference: | SM9835 |
Llanychaer (English: church on the Aer, a tributary of the River Gwaun) is a small rural village and parish in the community of Cwm Gwaun, north Pembrokeshire, Wales. It is southeast of the port of Fishguard.
Llanychaer was in the ancient hundred of Cemais. Early in the 19th century the population was 176 and only half the land in the parish was enclosed.[1] Later in the century, it was described as hilly, much of which was pasture, with the village consisting of a few farmhouses.[2]
Glandwr Baptist chapel in the village was built in 1894. The Reverend Carl D Williams, a well-known preacher in Wales, had been the minister for 28 years (in all, a minister for 50 years) until his retirement in 2010.[3]
There are two bridges crossing the Gwaun in the north of the parish: at Cilrhedyn and Llanychaer. A disused mill close to the latter is recorded at the end of the 19th century.[4]
The parish is in the Diocese of St Davids, absorbed with two other parishes into the larger Parish of Fishguard of the Church in Wales.[5] Llanychaer (as Llanachaier) appears on a 1578 parish map of Pembrokeshire.[6] It is rural, with scattered settlements.[7]
The parish church of St David dates back at least to the 12th century with evidence of earlier use as a place of worship, possibly as early as the 6th century. The present church was completely rebuilt on earlier foundations about 1876.