Down
Historic counties data provided by Association of British Counties / Historic Counties Trust.
| Name | Location | County | Country | Power source | Type | Function | River |
| Ballycopeland Windmill, Millisle | Millisle | Down | United Kingdom | Wind | Tower mill | Corn mill | |
| Coalisland Spade Mill, Ulster Folk and Transport Museum | Holywood | Down | United Kingdom | Water | Watermill | Forge mill | |
| Gorticashel Flax Mill, Ulster Folk and Transport Museum | Holywood | Down | United Kingdom | Water | Watermill | Flax mill, Scutching mill | |
| Sheepland Bay Mill, Ardglass | Ardglass | Down | United Kingdom | Wind | Corn mill |