Inverallochy Castle is a ruined courtyard castle, near the village of Inverallochy in the Buchan area of North-East Scotland, dating to 1504.[1] It lies 0.5 miles (0.80 km) south of Cairnbulg Castle, near Fraserburgh, and formerly stood beside the now-drained Loch of Inverallochy.[1] It was described by W. Douglas Simpson as one of the nine castles of the Knuckle, referring to the rocky headland of North-East Aberdeenshire.[2]