Llanfair Clydogau is a small village and community encompassing 3,232 hectares (7,990 acres), located about 4 miles (6.4 km) north-east of Lampeter on the B4343 road, in Ceredigion, Wales.

It has a population of 634 as of the 2011 UK census, 87.5% of whom are Welsh-speaking,[1] yet only 46% were born in Wales?.

[3] The community is located at the southernmost area of Ceredigion's former lead and silver mines, which until the 1760s were highly productive.

The basins of Clywedog-isaf, Clywedog-ganol and Clywedog-uchaf are nearby.

There are two churches still in regular use, Saint Mary's Parish Church[4][5] and the Welsh Independent Capel Mair, built in 1825,[3] which is a Grade II listed building.