A small, uninhabited, rocky, marine island and surrounding sea, situated 8 km south-west of Killybegs and 2 km off the County Donegal coast. The island is low-lying and flat-topped with short grassland vegetation.
The island is important for breeding seabirds.
BirdLife International (2017) Important Bird Areas factsheet: Inishduff. Downloaded from http://www.birdlife.org on 24/11/2017.