Currently, 36 countries participate in the program:
| Andorra | Hungary | New Zealand |
| Australia | Iceland | Norway |
| Austria | Ireland | Portugal |
| Belgium | Italy | San Marino |
| Brunei | Japan | Singapore |
| Czech Republic | Latvia | Slovakia |
| Denmark | Liechtenstein | Slovenia |
| Estonia | Lithuania | South Korea |
| Finland | Luxembourg | Spain |
| France | Malta | Sweden |
| Germany | Monaco | Switzerland |
| Greece | the Netherlands | United Kingdom |
Not all nationals of VWP countries may enter the United States without a visa.
To enter under the VWP, you must:
VWP travelers are screened prior to admission to the United States and must participate in the US-Visit Program.
VWP entrants may not extend their stay in the United States beyond the 90-day period.
U.S. Dept. of Homeland Security - Visa Waiver Program Traveler Guide (PDF)
Visa Waiver Program Emergency Passport Requirements (PDF)
CRS Report - Visa Waiver Program - Jan. 24, 2006 (PDF)
U.S. Dept of State - Visa Waiver Program
U.S. Customs and Border Protection - Visa Waiver Program Passport Requirements
U.S. Customs and Border Protection - Visa Waiver Program Applicant Responsibilities
U.S. Customs and Border Protection - Electronic System for Travel Authorization (ESTA)
U.S. Dept. of Homeland Security - ESTA
U.S. Dept. of Homeland Security - Visa Waiver Program: Passport Requirements Timeline
USCIS - WB Temporary Business Visitor under Visa Waiver Program
Shaping a Visa Policy in the National Interest - Washington Post - Feb. 5, 2007