| Old Dad Mountains | |
| Country: | United States |
| State: | California |
| District: | San Bernardino County |
| Topo Map: | Budweiser Wash |
| Topo Maker: | USGS |
| Range Coordinates: | 34.7758°N -115.8322°W |
| Elevation M: | 884 |
| Map: | California |
The Old Dad Mountains are a mountain range in San Bernardino County, California.
The range is named for Joseph "Old Dad" Wallace, a rail worker turned prospector from nearby Kelso. Accused of the murder of his fiancée, he left town and supported himself through mining the mountain range with his team of donkeys.