| Name | Location | County | Country | Power source | Type | Function | River |
| Barony Mills, Birsay | Birsay | Orkney | United Kingdom | Water | Watermill | Corn mill | Loch of Boardhouse |
| Boardhouse Threshing Mill, Birsay | Birsay | Orkney | United Kingdom | Water | Watermill | Threshing mill | Loch of Boardhouse |
| Old Barony Mill, Birsay | Birsay | Orkney | United Kingdom | Water | Watermill | Corn mill | Loch of Boardhouse |