There are numerous smaller Orkney islands surrounding the mainland, some which are islets only separated at higher stages of the tide, or skerries which are only exposed at lower stages of the tide.
These include Barrel of Butter, Bo Skerry, Bow Skerries, Braga, Brough of Bigging, Damsay, Holm of Houton, Holm of Grimbister, Holm of Rendall, Iceland Skerry, Inner Holm, Kirk Rocks, Little Skerry, Mirkady Point, Nevi Skerry, Outer Holm, Oyster Skerries, Puldrite Skerry, Quanterness Skerry, Scare Gun, Seal Skerry, Skaill Skerries, Skerries of Clestrain, Skerries of Coubister, Skerries of Lakequoy, Skerry of Work, Skerry of Yinstay, Smoogro Skerry, Thieves Holm, Whyabatten, and Yesnaby Castle.

The other islands in the Orkney Islands are generally classified as north or south of the Mainland.
The exceptions are the remote islets of Sule Skerry and Sule Stack, which lie 37 miles (60 km) west of the archipelago, but form part of Orkney for local government purposes.
There are numerous smaller Orkney islands surrounding the mainland, some which are islets only separated at higher stages of the tide, or skerries which are only exposed at lower stages of the tide. These include Barrel of Butter, Bo Skerry, Bow Skerries, Braga, Brough of Bigging, Damsay, Holm of Houton, Holm of Grimbister, Holm of Rendall, Iceland Skerry, Inner Holm, Kirk Rocks, Little Skerry, Mirkady Point, Nevi Skerry, Outer Holm, Oyster Skerries, Puldrite Skerry, Quanterness Skerry, Scare Gun, Seal Skerry, Skaill Skerries, Skerries of Clestrain, Skerries of Coubister, Skerries of Lakequoy, Skerry of Work, Skerry of Yinstay, Smoogro Skerry, Thieves Holm, Whyabatten, and Yesnaby Castle.
The other islands in the Orkney Islands are generally classified as north or south of the Mainland. The exceptions are the remote islets of Sule Skerry and Sule Stack, which lie 37 miles (60 km) west of the archipelago, but form part of Orkney for local government purposes.
Mainland, Orkney