Do U.S. Citizens Need a Visa to Visit Australia?
Yes, in the sense that U.S. citizens need an Australian visa or electronic travel authority before travelling.
For short visits, many eligible American passport holders may use Australia’s Electronic Travel Authority (ETA), subclass 601.
The ETA can allow eligible travelers to visit Australia multiple times during its validity period, with a stay of up to three months on each visit.
The ETA is generally valid for travel for 12 months from the date it is granted, or until the passport expires if that happens earlier.
That means an American traveler could potentially enter Australia more than once during the ETA’s validity period, but each individual stay is generally limited to three months.
Australia Electronic Travel Authority (Subclass 601)�