奥斯特拉尔岛是南极洲的岛屿，位于威尔克斯地，处于彭尼湾南端，属于风车行动群岛的一部分，根据美国海军拍摄空中照片绘入地图，现时由南极条约体系管理。

 本条目引用的公有领域材料来自美国地质调查局的文档 《奥斯特拉尔岛》(数据来自地名信息系统)。

Austral Island is a small Antarctic island in the extreme southern lobe of Penney Bay, in the Windmill Islands. 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.