Radnorshire
Historic counties data provided by Association of British Counties / Historic Counties Trust.
| Name | Location | County | Country | Power source | Type | Function | River |
| Bleddfa Mill, Bleddfa | Bleddfa, Llangunllo | Radnorshire | United Kingdom | Water | Watermill | Corn mill, Saw mill | Tributary to Lugg |
| Cloth Factory, Llanfihangel Rhydithon | Llanfihangel Rhydithon | Radnorshire | United Kingdom | Water | Watermill | Carding mill | Maes Brook |
| Clyro Mill, Clyro | Clyron | Radnorshire | United Kingdom | Water | Watermill | Corn mill | Clyro Brook |
| Gro Mill, Elan Valley | Elan Valley, Rhayader | Radnorshire | United Kingdom | Water | Watermill | Corn mill, Saw mill | Elan |
| Gwynllyn Mill, Rhayader | Rhayader | Radnorshire | United Kingdom | Water | Watermill | Corn mill | Nant Gwynllyn |
| Hundred House Mill, Hundred House | Hundred House | Radnorshire | United Kingdom | Water | Watermill | Corn mill | Edw |
| Lower Mill, Rhayader | Rhayader | Radnorshire | United Kingdom | Water | Watermill | Corn mill | Nant Gwynllyn |
| Nant Gwylt Saw Mill, Elan Valley | Elan Valley, Rhayader | Radnorshire | United Kingdom | Water | Watermill | Saw mill | Nant Gwyllt |
| Saw mill, Court Farm, Evenjobb | Evenjobb, Old Radnor | Radnorshire | United Kingdom | Water | Watermill | Saw mill | Knobley Brook |
| Saw mill, Dderw Estate, Rhayader | Rhayader | Radnorshire | United Kingdom | Water | Watermill | Saw mill | Nant Gwynllyn |
| Tannery, Rhayader | Rhayader | Radnorshire | United Kingdom | Water | Watermill | Bark mill, Tannery | Wye |
| Walk mill, Cregrina | Cregrina, Glascwm | Radnorshire | United Kingdom | Water | Watermill | Woollen mill | Edw |
| Walk Mill, Llanbadarn Fynydd | Llanbadarn Fynydd | Radnorshire | United Kingdom | Water | Watermill | Fulling mill | Crychell Brook |
| Watermill, Howley | Howley | Radnorshire | United Kingdom | Water | Watermill | Corn mill | |
| Watermill, Llowes | Llowes | Radnorshire | United Kingdom | Water | Watermill | ||
| Whittey's Mill, Clyro | Clyro | Radnorshire | United Kingdom | Water | Watermill | Corn mill | Cabalva Brook |