Clynnog Fawr, often simply called "Clynnog", is a village and community on the north coast of Llŷn Peninsula in Gwynedd, north-west Wales. It is in the historic county of Caernarfonshire. The community includes Pant Glas.

Gwynedd is a county in the north-west of Wales. It borders Anglesey across the Menai Strait to the north, Conwy, Denbighshire, and Powys to the east, Ceredigion over the Dyfi estuary to the south, and the Irish Sea to the west. The city of Bangor is the largest settlement, and the administrative centre is Caernarfon. The preserved county of Gwynedd, which is used for ceremonial purposes, includes the Isle of Anglesey.