Llanfoist is a village that lies on the lower slopes of Blorenge (561m) in the Usk Valley in Monmouthshire, Wales. The village lies south west of Abergavenny, north west of Llanellen, north east of Blaenavon and south east of Crickhowell.

Llanfoist, Welsh: Llanffwyst, lies between the River Usk and the Monmouthshire and Brecon Canal. The Monmouthshire and Brecon Canal winds its way through 35 miles of peaceful countryside all the way from Brecon to Cwmbran. Its pretty scenery and lightly-locked route make it understandably popular with holidaymakers. Set almost entirely within the Brecon Beacons National Park, the canal is among the most beautiful anywhere on the waterways.

Other attractions in Llanfoist include the Usk Valley Walk that passes through the village. Take the 48 mile (77km) walk through the beautiful Vale of Usk to appreciate the true beauty of its largely unspoilt countryside. Follow the trail and visit the market towns of Caerleon, Usk, Chain Bridge, Llanvihangel Gobion, Llanellen, Abergavenny, Govilon, Llangattock, Crickhowell, Llangynidr, Aber, Talybont on Usk and Brecon. You are never far from the hills of the Brecon Beacons to the west or the Black Mountains to the east.