Administrative Boundary of Gwynedd

About Gwynedd

Gwynedd is a principal area in north-west Wales, encompassing much of Snowdonia and the Llŷn Peninsula. Covering approximately 2,535 square kilometres, Gwynedd had a population of approximately 124,000 at the 2022 Census, and has the highest proportion of Welsh speakers of any principal area in Wales, with more than 65 per cent of residents able to speak the language. Snowdon and Snowdonia National Park Snowdonia National Park (Parc Cenedlaethol Eryri), established in 1951 as one of the first national parks in Britain, covers much of Gwynedd and is dominated by Snowdon (Yr Wyddfa), the highest peak in Wales at 1,085 metres; the summit has been accessible since 1896 by the Snowdon Mountain Railway, the only rack-and-pinion railway in the United Kingdom. Gwynedd's former slate quarries around Blaenau Ffestiniog once supplied roofing slate across the world, and the narrow-gauge Ffestiniog Railway, built to carry slate down to the coast, is among the "Great Little Trains of Wales" that now carry visitors through the mountains as heritage tourist attractions; the Slate Landscape of North-West Wales was inscribed as a UNESCO World Heritage Site in 2021. Caernarfon Castle and Portmeirion Caernarfon Castle, begun in 1283 by Edward I as the most imposing of his Welsh fortresses, is part of the "Castles and Town Walls of King Edward in Gwynedd" UNESCO World Heritage Site and has twice hosted the investiture of a Prince of Wales, most recently Charles (later King Charles III) in 1969. Portmeirion, an elaborate Italianate village on the coast built between 1925 and 1975 by the architect Sir Clough Williams-Ellis, is renowned both for its whimsical architecture and as the filming location for the 1960s television series "The Prisoner." GIS and Boundary Data The administrative boundary of Gwynedd Council is available for free download in GeoJSON and KML formats, sourced from the OS Open Geography portal (Crown copyright 2024). Compatible with QGIS, ArcGIS, Mapbox, and Google Earth, the dataset supports mountain and national park planning, industrial heritage mapping, Welsh-language demographic research, and castle heritage study across the Gwynedd council area.

📍 Administrative boundary of Gwynedd county