St Arvans (Welsh: Llanarfan) is a village and community (equivalent to a parish) in Monmouthshire, south-east Wales.

The name "Sain Arfan" was incorrectly placed on signage provided by Monmouthshire county council, sometime between 2005 and 2010, as a Welsh language version of St Arvans.

It took over 10 years before the signage was corrected to match the fountain stone tablet, and the historically used "Llanarfan" (Welsh translation for the Parish of St Arvans) in 2022.

There are remains of a Celtic cross of the period, and also part of an apparently Saxon doorway, but essentially the original church was late Norman in date.

To the north of the village is Wyndcliffe Court, a Grade II* listed house and gardens in the Arts and Crafts style.