Inis Cathaigh, Scattery Island or Inniscattery Island is an island in the Shannon Estuary, Ireland, off the coast of Kilrush, County Clare. The island is home to a lighthouse, a ruined monastery associated with Saints Senan and Canir, an Irish round tower and the remains of an artillery battery. The last residents left in 1969. Most of the island is now owned by the Office of Public Works, who run a small visitor centre and carry out repairs and maintenance on the island; it was bought by Dúchas in 1991.The Irish name Inis Cathaigh was formerly anglicised Iniscathy, which later became Iniscattery and finally Scattery.