磁岛（Magnetic Island）是与澳大利亚昆士兰州汤斯维尔市隔海相望的一个岛屿。位于克利夫兰湾，总面积52平方公里，地形多山。它是汤斯维尔市城区之一，永居人口共2107人。

磁岛是著名的度假胜地。岛上有占地27平方公里的国家公园与鸟类保护区，亦有众多徒步小径与供游客参观的二战堡垒。岛上基础设施由汤斯维尔市议会管理。

Magnetic Island is an island 8 kilometres (5.0 mi) offshore from the city of Townsville, Queensland, Australia. This 52 km (20.1 sq mi) mountainous island in Cleveland Bay has effectively become a suburb of Townsville, with 2,107 permanent residents. The island is accessible from Townsville Breakwater to Nelly Bay Harbour by ferry. There is a large 27 km (10.4 sq mi) National Park and bird sanctuary and walking tracks can be taken between the populated bays and to a number of tourist destinations such as the World War II forts.