| Defender Mountain | |
| Other Name: | Mount Defender |
| Elevation M: | 2821 |
| Elevation System: | NAD83 |
| Prominence M: | 211 |
| Map: | Canada Alberta#Canada British Columbia#Canada |
| Map Size: | 200 |
| Label Position: | right |
| Location: | Alberta British Columbia |
| Country: | Canada |
| Subdivision1 Type: | Province |
| Parent: | Canadian Rockies |
| Coordinates: | 50.6014°N -115.2908°W |
Defender Mountain is located on the border of Alberta and British Columbia on the Continental Divide.
Defender Mountain was named in 1916 by the Interprovincial Boundary Survey after the British Royal Navy ship that took part in the Battle of Jutland in World War I. The mountain's name was officially adopted as Mount Defender in 1924 by the Geographical Names Board of Canada and officially changed to Defender Mountain in 1966.