You must have a valid U.S. passport and a visa or an approved Electronic Travel Authority (ETA) to enter Australia. Most U.S. passport holders traveling to Australia for tourism or business purposes for less than 90 days can obtain an ETA.

In 2026, almost all non-citizens require a visa or travel authority to enter Australia, with the specific type depending on your nationality and the purpose of your visit. Citizens of many countries, including the US, Canada, and the UK, can apply for an Electronic Travel Authority (ETA) or an eVisitor visa (Subclass 651) for short-term tourism or business visits of up to three months. These are usually processed quickly through the Australian government's official mobile app. However, for citizens of many other countries, a more formal Visitor Visa (Subclass 600) is required, which involves a more detailed application process including financial evidence and proof of ties to your home country. Recently, in early 2026, Australia increased the "evidence levels" for student and visitor applicants from several South Asian nations to combat fraud. It is essential to apply well in advance, as median processing times can range from three to eight weeks. Always check the official Department of Home Affairs website for the most current requirements before booking your travel.