What is a U.S. Visa?
A citizen of a foreign country who seeks to travel to the United States generally must first obtain a U.S. visa. Visas are placed in the traveler’s passport, a travel document issued by the traveler’s country of citizenship.
Certain international travelers may be eligible to travel to the United States without a visa if they meet the requirements for visa-free travel. The visa section of this website contains information on U.S. visas for foreign citizens seeking to travel to the United States.
(Note: U.S. citizens don’t need a U.S. visa for travel, but when planning travel abroad may need a visa issued by the country they wish to visit. When planning travel abroad, learn about visa requirements by country, on the country information page of the International Travel Section of this website).
Find out what visa type is appropriate for you
The type of visa you must obtain is defined by U.S. immigration law, and relates to the purpose of your travel.
Please visit our Visa Wizard to find out what visa type is appropriate for you.
You can also visit our Frequently Asked Questions or find out about the Visa Waiver Program.
Other useful links: Visa Categories | Find a U.S. Embassy or Consulate | Glossary | Forms
Need a Visa letter?
This global gathering of leading researchers, developers, and innovators in the field of porous materials will feature a dynamic program of presentations, workshops, and networking opportunities designed to explore the intersection of fundamental science and real-world applications. MOF2026 is the premier international forum for advancing the design and impact of metal-organic frameworks, covalent organic frameworks, and related materials. Join us in New Orleans to connect with global experts, discover groundbreaking innovations, and shape the future of framework chemistry.
Looking to attend MOF 2026 and need a visa letter use the button below to request a visa letter.
Social Media
