| Name | Location | County | Country | Power source | Type | Function | River |
| Factory Fawr, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Arran |
| Factory Isaf, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |
| Fron-Goch Factory, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |
| Idris Factory, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran |
| Llwyn Saw Mill, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Saw mill | Wnion |
| Pandy Clywedog, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Saw mill, Woollen mill | Clywedog |
| Pandy Gadair, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |
| Pandy Odyn, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Tributary to Wnion |
| Pandy Stukeley, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |
| Torrent Walk Mill, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Fulling mill | Clywedog |
| Upper Mill, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Corn mill | Arran |
| Upper Neint Factory, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |
| Watermill, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Tributary to Wnion |
| Wenallt Factory, Dolgellau | Dolgellau | Merionethshire | United Kingdom | Water | Watermill | Woollen mill | Aran/Arran |