Iselborgh

Iselborgh
Cairn na Burgh Beag, a possible location for Iselborgh
Coordinates	56°31′05″N 6°22′48″W / 56.518°N 6.38°W / 56.518; -6.38
Argyll and Bute showing the location of Cairnburgh Castle. Tiree is to the west, Mull to the east and Coll to the northwest.

Iselborgh or Isleborg is a fortification of uncertain location on the western seaboard of Scotland. Suggested sites for the castle are: Cairn na Burgh Beag, the smaller islet that forms part of Cairnburgh Castle; a former castle in Loch an Eilien on Tiree; and somewhere on the nearby islands of Mull and Coll.^[1]

There are a few written records of the castle's existence from the 14th to the late 15th century indicating its presence off the coast of Argyll. The name may mean simply "island fort".