You must have a valid U.S. passport and a visa to enter Australia. Most U.S. passport holders traveling to Australia for tourism or business purposes for less than 90 days can obtain an Electronic Travel Authority (ETA). The ETA is an electronic label-free visa and can be obtained at the ETA website for a small service fee. Airlines and many travel agents in the United States are also able to apply for ETAs on behalf of travelers. If you overstay your ETA or any other visa, even for short periods, you may be subject to exclusion, detention, and removal by the Australian Department of Immigration and Border Protection (DIBP). You can obtain more information about the ETA, other visas, and entry requirements from the Embassy of Australia at 1601 Massachusetts Avenue, NW, Washington, DC 20036, via the Australian Visa Information Service at 905-280-1437 (toll charges to Canada apply) or the Embassy’s website.
If you are, travelling on a valid U.S. ePassport and are 16 years of age or older, you are eligible to use Australia’s automated border processing system, SmartGate, upon arrival in Australia. There is no additional enrollment process or fee to participate in SmartGate. For more information on using SmartGate and for information on participating airports in Australia, visit the website for SmartGate.