Llanfoist Fawr is a community in the county of Monmouthshire, Wales, and is located 23.8 miles from Cardiff and 126.3 miles from London. In 2011 the population of Llanfoist Fawr was 3217 with 10.2% of them able to speak Welsh. The community includes the villages of Govilon, Llanwenarth, Llanellen and Llanfoist itself. The name of the local school is also Llanfoist Fawr. Llanfoist Fawr is also the name of a county electoral ward, which elects a county councillor to Monmouthshire County Council.