Arranmore

Árainn Mhór is an island off the west coast of County Donegal, Ireland. Arranmore is the largest inhabited island of County Donegal, with a population of 469 in 2016, but has had a gradually falling native population since the 1990s. Its main settlement is Leabgarrow. The island is part of the Gaeltacht, with most of the inhabitants speaking Ulster Irish.

It is also known in English as Arran Island. In Irish it was traditionally called Árainn; the adjective mór was added fairly recently. It was also sometimes called Árainn Uí Dhomhnaill, 'Aran of the O'Donnells'.