International Astronautical Congress 2025

The 76th International Astronautical Congress (IAC) will be held in Sydney, Australia from 29 September to 3 October 2025. IAC 2025 is hosted by Space Industry Association of Australia (SIAA) and co-hosted by Australian Space Agency and NSW Government.

The International Astronautical Congress has been organized two times prior in Australia, most recently in 2017 with the 68th IAC in Adelaide and before that the 49th IAC in Melbourne 1998. The IAF is delighted to return once again to this captivating continent in Oceania and to bring the IAC to the beautiful harbour city, Sydney. SIAA has already proven to be an excellent host and the 76th IAC vows to be an outstanding event.

The theme of IAC Sydney 2025 is “Sustainable Space: Resilient Earth” which will set the stage for important discussions such as: space-based application for earth; sustainable space activities; and sustaining life off earth. Key focus areas include showcasing the Asia Pacific region, inspiring and engaging the next generation’s space workforce, engaging a broad range of industries, and educating the community about ‘why space matters’ through the IAC’s open day.

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