Bangor is a cathedral city and community in Gwynedd, North Wales. It is the oldest city in Wales. Historically part of Caernarfonshire, it had a population of 15,100 at the 2021 census. Landmarks include Bangor Cathedral, Bangor University and Garth Pier. The Britannia and Menai Suspension bridges connect the city to the Isle of Anglesey.

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.