Penboyr is a hamlet in the county of Carmarthenshire, Wales consisting of a number of houses, smallholdings, farms and a church.

"This is a small area within modern Carmarthenshire consisting of regular rectangular fields and dispersed farms.

Numerous castles were established in Uwch-Cych comote - none of which has any recorded history - but the commote was back under Welsh control by the 1130s, where it remained throughout the 12th and early 13th centuries.

However, the church dedication to St Llawddog may be later medieval, when his cult was still active in the area.

The church was first recorded in 1222 when it was ‘restored’ to the Bishops of St Davids, to be counter-claimed by the crown.

Its early parish status, along with its close relationship to the castle, suggests that the two represent a deliberate Anglo-Norman plantation.

"[1] "Penboyr (PEN-BOYR), a parish, in the union of Newcastle-Emlyn, higher division of the hundred of Elvet, county of Carmarthen, South Wales, 4 miles (S.E.)

the crops chiefly consisting of wheat, barley, and oats; the prevailing timber is oak and ash.

The church, dedicated to St. Llawddog, a very ancient building in a dilapidated state, was taken down and rebuilt from the ground, in 1809 .