Except for green card holders and those who qualify for visa-free travel to the United States (see Visa Waiver Program), foreign nationals traveling to the U.S. must have a visa to enter the country.

For those who do not qualify for visa-free travel, here is a list of the various nonimmigrant visa categories:

• B-1 (Business Travel )
• B-2 (Tourists)
• Employment Visas:
  • H1-B
  • H2-B
  • H-3 (Practical Trainees)
  • L-1 (Intracompany Transferees)
  • O-1 (Persons With Extraordinary Ability)
  • P (Athletes and Entertainers)
  • R-1 (Religious Workers)
• Study and Exchange Visas:
  • F-1 (Students)
  • J-1 (Exchange Students or Trainees)
• Investment Visas:
  • E-1 (Treaty Traders)
  • E-2 (Investors)