Llanfair Dyffryn Clwyd is a village in the Vale of Clwyd in Denbighshire, Wales. The village lies on the A525 road between the town of Ruthin and the Nant y Garth Pass, which cuts through the beautiful Clwyd Range of Hills.

With its imposing 15th Century church, the village is also home to a traditional pub, the White Horse, which serves food and is only a few minutes drive from other local amenities.

The church of St Cynfarch and St Mary lies in the centre of Llanfair village. It is double-naved with a west tower and as far as can be ascertained is a wholly Perpendicular structure of the 15th Century, which was restored in the 1870s. It retains fragments of its medieval rood screen, a 15th Century sepulchral slab and some very early 16th Century stained glass, as well as reconstructed late medieval arch-braced roofs.

The hilltop town of Ruthin, just a mile or so to the north, boasts half-timbered buildings clustered around the historic St Peter's Square as well as numerous interesting shops and boutiques. The Ruthin Craft Centre houses work by internationally recognised artists and craftspeople. Other attractions nearby include the River Dee, which offers excellent fishing and exhilarating white water rafting, whilst the scenic Lake Brenig, Moel Famau, Loggerheads Country Park and Clocaenog Forest are all close by for picturesque walks and mountain bike rides.

There are many trails criss crossing the landscape of the beautiful Vale of Clwyd and the village is some two miles west of the Offa's Dyke Path, part of the All Wales Path.

The Clwyd Hills to the north east of the village are home to many mountain bike trails, suitable for both beginners and more experienced cyclists.

Snowdonia National Park and the beaches of the North Wales coast are also within easy driving distance.