| Name | Location | County | Country | Power source | Type | Function | River |
| Cerist Mill, Dinas Mawddwy | Dinas Mawddwy | Merionethshire | United Kingdom | Water | Watermill | Corn mill | Maesglase Stream |
| Cirisi Mill, Dinas Mawddwy | Dinas Mawddwy | Merionethshire | United Kingdom | Water | Watermill |