| Name | Location | County | Country | Power source | Type | Function | River |
| Chaff mill, Gerddi Bluog, Llanfair | Llanfair | Merionethshire | United Kingdom | Water | Watermill | Farm mill, Hulling mill | |
| Upper Mill, Llanfair | Llanfair | Merionethshire | United Kingdom | Water | Watermill |