Yr Hen Gapel (Welsh for The Old Chapel) is a now ruined religious building and scheduled ancient monument in the village of Llanybri, Carmarthenshire, Wales.

[2] The remaining chapel consists of a square tower at the western end and a ruined nave to the east, all built from rubble stone.

The eastern end wall is approximately 3 metres in height and still retains a traceried window opening with trefoiled heads.

On the west face is a false stone clockface dated 1879, with the 'hands' set at five minutes to ten.

[3] The congregation purchased the chapel in 1878, making changes including removal of the upper storey of the tower and the addition of a pyramid roof[1] (the tower was originally battlemented and was recorded in the 1500s as having bells).