Monkton Old Hall is a Grade I listed building in Pembroke, Pembrokeshire.

The building was originally a guesthouse for Monkton Priory, located nearby.

The current building mostly dates from the 14th century, but the chimney is of earlier construction in the Norman architectural style.

J.R. Cobb began a restoration in 1879, as it had been reduced to a ruin consisting of an empty shell.

[4] In 1979, Leonard Beddall-Smith conducted further works on the building on behalf of the Landmark Trust, which now offers it as a holiday let.