The Church in Wales parish church is a Grade II* listed building dedicated to
St Egwad, a 7th-century bishop in Wales. The tower, probably the earliest part, dates from about 1400. The north aisle was added in the 16th century. The building was restored in 1861, when further windows were added. The only indication of a previous church further up the valley is in the name of a farm: Bryn-Yr-Eglwys ("Hill of the Church"). In 1844 Llanfynydd was a parish of 11,000 acres and 1,358 inhabitants in Cathinog Hundred. By 1929 the population was down to 581.
Worship Parish registers exist from 1692. The parish also has several chapels. However, in December 2014 the BBC reported that though the school had no pupils, it could not be closed until the county council had held a consultation and a vote on the issue. ==Public protest==