General Requirements:
Austria tourist visa is not required for citizens of United States for a stay up to 90 days.
All travelers will need a passport valid for at least 90 days following your departure date from Austria. However, it is strongly recommended traveling with 6 months validity on your passport at all times.
Most destinations, including Austria, require that you have adequate un-used pages in your passport, allowing for any necessary stamps upon arrival and departure. It is recommended that you have at least two free pages in Visas section of your passport before any international travel. U.S. citizens can get extra passport pages added to their passports as fast as within 24 hours.
Check with your airline in case you have connecting flights overseas as part of your journey to Austria. It may be the case that countries you pass through en route to your destination may require a separate transit visa. Please refer to visa requirements of the specific country.
General Consulates of Austria: