The Oceania Union is a power bloc in the Cosmic Era timeline.
A union of countries in Oceania, which includes the Australian continent and its neighboring nations. The capital is located in Wellington, New Zealand. The Oceania Union aims to improves its global competitiveness as well as its gross domestic product by actively accepting Coordinators as part of the labor workforce. During the First Alliance-PLANT War, it allied itself with the PLANTs, and hosted the Carpentaria Base, ZAFT's first terrestrial stronghold. At the start of "SEED DESTINY", all of Australia, except for the Australian continent where Carpentaria Base is located, is in the sphere of influence of the Earth Alliance.