| Old Mill Road Bridge | |
| Location: | West of Rocky Ridge on Old Mill Rd. over Owens Creek, Rocky Ridge, Maryland |
| Coordinates: | 39.6019°N -77.3386°W |
| Builder: | Pittsburgh Bridge Co. |
| Architecture: | Pratt truss |
| Added: | March 7, 1979 |
| Refnum: | 79001131 |
The Old Mill Road Bridge is a historic bridge near Rocky Ridge, Frederick County, Maryland, United States. The bridge spans Owens Creek southwest of Rocky Ridge on Old Mill Road. It is a Pratt half-hip through truss structure in a single span long and . It was built in 1882 by the Pittsburgh Bridge Company, Pittsburgh, Pennsylvania.[1]
The Old Mill Road Bridge was listed on the National Register of Historic Places in 1979.