| Name | Location | County | Country | Power source | Type | Function | River |
| Union Mill, Union Mills Homestead Historic District, Westminster | Westminster, Carroll County, Maryland | United States | Water | Watermill | Corn mill | Big Pipe Creek |
| Name | Location | County | Country | Power source | Type | Function | River |
| Union Mill, Union Mills Homestead Historic District, Westminster | Westminster, Carroll County, Maryland | United States | Water | Watermill | Corn mill | Big Pipe Creek |