The Pentland Skerries (Old Norse: Pettlandssker) are a group of four uninhabited islands lying in the Pentland Firth, northeast of Duncansby Head and south of South Ronaldsay in Scotland.
By far the largest of the islands is Muckle Skerry, home to two lighthouses, built in 1794. The other islands are Little Skerry, Louther Skerry and Clettack Skerry.
- ^ Pedersen, Roy (January 1992) Orkneyjar ok Katanes (map, Inverness, Nevis Print)
Coordinates: 58°40′54″N 2°54′50″W / 58.68167°N 2.91389°W