Llan Ffestiniog, also known as Ffestiniog or simply Llan, is a village in Gwynedd, Wales, about 2 miles south of Blaenau Ffestiniog. Llan Ffestiniog is the older of the two communities, with its church and other buildings predating most of Blaenau Ffestiniog. The population was given as 864 in the 2011 census.

Blaenau Ffestiniog is a town in Gwynedd, Wales. Once a slate mining centre in historic Merionethshire, it now relies much on tourists, drawn for instance to the Ffestiniog Railway and Llechwedd Slate Caverns. It reached a population of 12,000 at the peak development of the slate industry, but fell with the decline in demand for slate. The population of the community, including the nearby village Llan Ffestiniog, was 4,875 at the 2011 census: the fourth most populous in Gwynedd after Bangor, Caernarfon and Llandeiniolen. The population not including Llan is now only about 4,000.