Doonagore Castle is a round 16th-century tower house with a small walled enclosure located about 1 km above the coastal village of Doolin in County Clare, Ireland. Its name may mean "the fort of the rounded hills" or the "fort of the goats"; it sits on a hill overlooking Doolin Point and, along with a nearby higher radio mast, is used as a navigational point by boats approaching Doolin Pier.