Árainn Mhór (English name: Arranmore) is the largest inhabited island of County Donegal, and the second largest in all of Ireland, with a population of 514 in 2011, down from 528 in 2006, 543 in 2002, and over 600 in 1996. The island is part of the Donegal Gaeltacht. Arranmore lies off the west coast of County Donegal, Republic of Ireland. It is also known in English as Aran Island (not to be confused with the Aran Islands off Galway Bay or the Scottish Isle of Arran).