The Australian International Airshow, also called the Avalon Airshow, is a large air show held biennially at Avalon Airport, between Melbourne and Geelong in Victoria.

The event has a strong focus on military aviation, featuring aircraft from the Royal Australian Air Force, United States Navy and the United States Air Force. Representatives from other air arms have also appeared at the airshow on many occasions, including aircraft from the Royal Air Force, Japan Air Self-Defense Force, Republic of Singapore Air Force and many others.

It has been said by air show organisers to be the largest air show in the southern hemisphere.