| Name | Location | County | Country | Power source | Type | Function | River |
| Alwen Saw Mill, near Maerdy | Llandderfel | Merionethshire | United Kingdom | Water | Watermill | Saw mill | Alwen |
| Bettws Gwerfil Goch Mill, Bettws Gwerfil Goch | Bettws Gwerfil Goch | Merionethshire | United Kingdom | Water | Watermill | Corn mill | Alwen |
| Pont Barker Bark Mill, Druid | Druid, Corwen | Merionethshire | United Kingdom | Water | Watermill | Bark mill | Alwen |