| Austral Island | |
| Map: | Antarctica |
| Location: | Antarctica |
| Coordinates: | -66.5°N 149°W |
| Archipelago: | Windmill Islands |
| Population: | Uninhabited |
| Country: | None |
| Treaty System: | Antarctic Treaty System |
Austral Island is a small Antarctic island in the extreme southern lobe of Penney Bay, in the Windmill Islands.[1] The island appears in air photos taken by USN Operation Highjump (1946–47), but was not charted on subsequent maps. So named by US-ACAN because it is the southernmost of the Windmill Islands.