Visitors to the United States must obtain a visa from one of the U.S. diplomatic missions unless they come from one of the visa-exempt or Visa Waiver Program countries. The same rules apply for travel to all U.S. states, Washington, D.C., Puerto Rico and the U.S. Virgin Islands, as well as to Guam and the Northern Mariana Islands with additional waivers, while similar but separate rules apply to American Samoa.
The U.S. government requires all individuals entering or departing the United States by air, or entering the United States by sea from outside the Americas, to hold one of the following documents:[1]
For entry by land or sea from the Americas, individuals must present one of the documents acceptable for entry by air or one of the following:[1]
Nationals of Mexico may use a Border Crossing Card, which serves as a visa when presented with a passport. Without a passport, the card on its own also allows entry by land or sea while remaining within 25 miles (40 km) from the Mexico–United States border (up to 75 miles in Arizona and 55 miles in New Mexico) for a stay of up to 30 days.[5][6]
Children born to a U.S. permanent resident mother during a temporary visit abroad do not need a passport or visa at the mother’s first re-entry to the United States within two years after birth. Similarly, children born abroad to a parent with a U.S. immigrant visa after its issuance do not need a passport or visa if listed in the parent’s passport with a birth certificate.[1]
While there are about 185 different types of U.S. visas,[7] there are two main categories:
A U.S. visa does not authorize entry into the United States or a stay in a particular status, but only serves as a preliminary permission to travel to the United States and to seek admission at a port of entry. The final admission to the United States is made at the port of entry by a U.S. Customs and Border Protection (CBP) officer. For those entering in a nonimmigrant visa status, the admission details are recorded by the CBP officer on a Form I-94 (or Form I-94W for nationals of the Visa Waiver Program countries for short visits), which serves as the official document authorizing the stay in the United States in a particular status and for a particular period of time.[8] In order to immigrate, one should either have an immigrant visa or have a dual intent visa, which is one that is compatible with making a concurrent application for nonimmigrant and immigrant status.
Entering the United States on an employment visa may be described as a three-step process in most cases. First, the employer files an application with U.S. Citizenship and Services We Offer requesting a particular type of category visa for a specific individual. If the employer’s application is approved, it only authorizes the individual to apply for a visa; the approved application is not actually a visa. The individual then applies for a visa and is usually interviewed at a U.S. embassy or consulate in the native country. If the embassy or consulate grants the visa, the individual is then allowed to travel to the United States. At the airport, border crossing or other point of entry, the individual speaks with an officer from U.S. Customs and Border Protection to request admission, and if approved, the individual may then enter the United States.[7]
In addition to immigration sponsored by a U.S. family member or employer, about 55,000 immigrant visas are available each year to natives of certain countries under the Diversity Immigrant Visa program, also known as the green card lottery.
