Aran Fawddwy is a mountain in southern Snowdonia, Wales, United Kingdom. It is the highest point (county top) of the historic county of Merionethshire (for local government purposes, it lies within the current council area of Gwynedd). It is the only peak in Wales outside North Snowdonia above 900m, and higher than anywhere in Great Britain outside Northern Snowdonia, the Scottish Highlands (and islands) and the Lake District. The nearest urban centres to the mountain are Dinas Mawddwy to the south, Llanymawddwy to the southeast, Llanuwchllyn on the shores of Bala Lake to the north, and Rhydymain to the west.