| Big Otter Mill | |
| Designated Other1: | Virginia Landmarks Register |
| Designated Other1 Date: | September 14, 1998[1] |
| Designated Other1 Number: | 009-0152 |
| Designated Other1 Num Position: | bottom |
| Location: | VA 122, near Bedford, Virginia |
| Coordinates: | 37.3908°N -79.5039°W |
| Builder: | Forbes, John; Forbes, Reed |
| Architecture: | Grist mill |
| Added: | October 30, 1998 |
| Refnum: | 98001314 |
Big Otter Mill, also known as Forbes Mill, is a historic grist mill located near Bedford, Bedford County, Virginia, USA. It was built about 1920 and is a large, 2½-story, mortise-and-tenon framed mill building, topped by an unusual and picturesque mansard roof. The mill retains a nearly complete set of early-20th century machinery, including a 13-feet diameter water wheel, which was used until the late 1940s. Also on the property are a contributing mill race and the foundation of a store.[2] The building is under restoration as a mill museum.
It was listed on the National Register of Historic Places in 1998.