Mount Defiance
Mount Defiance may refer to:
;In Australia
| Name | Elevation | Coordinates | Map number | Gazetteer of Australia reference |
| Mount Defiance (Victoria) | 7420 |
;In the United States
| Name | Elevation | Coordinates | USGS Map | Geographic [Names Information System|GNIS] ID |
| Mount Defiance (California) | North Chalone Peak | |||
| Mount Defiance (New Jersey) | Ramsey | |||
| Mount Defiance (New York) | Ticonderoga | |||
| Mount Defiance (Oregon) | Mount Defiance | |||
| Mount Defiance (Tennessee) | Watertown | |||
| Mount Defiance (Washington) | Bandera |