| Southwest Island | |
| Map: | Nova Scotia |
| Location: | St. Margarets Bay |
| Coordinates: | 44.5069°N -63.9948°W |
| Total Islands: | Three |
| Elevation M: | 27 |
| Elevation Footnotes: | above mean higher high water |
| Country: | Canada |
| Country Admin Divisions Title: | Province |
| Country Admin Divisions: | Nova Scotia |
| Country1 Admin Divisions Title: | County |
| Country1 Admin Divisions: | Lunenburg County |
| Population: | 0 |
| Density Km2: | 0 |
Southwest Island is an uninhabited,[1] 30acres island in the southwest corner of St. Margarets Bay, Nova Scotia.[2]