This community wiki explains the current restrictions by the United States of America on the entry of individuals who may pose a risk of transmission of the SARS-Cov2, the virus which causes the Covid-19 disease.
This answer currently lists nationwide entry restrictions imposed by the United States federal (national) government in response to COVID-19. There used to be state-specific restrictions (such as for Hawaii) but those have been replaced with nationwide rules by November 8th 2021.
Travelers who do not already have a valid visa and will need one for their planned travel should note that the US Embassies and Consulates are open at this time for limited services. Check the website of the consulate in your country for more information.
Foreigners entering the US by air as nonimmigrants, or foreigners other than lawful permanent residents entering the US by land or ferry, must be fully vaccinated against COVID-19, which means two weeks after receiving the last dose of one of the seven WHO accepted vaccine products, the experimental Novovax/Covovax vaccine in a Phase III trial, or the CanSinoBIO, Clover Biopharm, or Sinopharm/WIPB vaccine in a clinical trial. Receiving a placebo in a clinical trial is not acceptable.
The entry vaccine requirement does not apply to US citizens, US nationals, or lawful permanent residents (green card holders). The entry vaccine requirement does not apply to immigrant visa holders entering the US by air; however, a separate requirement as part of the existing medical exam requirement, means that new immigrants must also receive the COVID vaccine prior to receiving such a visa.
The following exceptions are permitted:
- air and sea crew members adhering to industry standards
- diplomats and foreign officials
- children under 18
- those who can't receive vaccines due to medical reasons
- participants in certain COVID-19 vaccine trials
- those in countries where COVID-19 vaccine availability is limited, seeking to enter the US on a nonimmigrant visa other than B-1/B-2 visitor visa
- those granted exceptions by officials
- US military members and their immediate family
Foreigners who are not fully vaccinated but allowed to enter the US due to the above exceptions must agree to comply with certain health precautions, and (with some exceptions) must agree to be vaccinated against COVID-19 in the US within 60 days of entry.
Air entry restrictions:
Land entry restrictions:
COVID-19 test requirement
All travelers to the US by air, including US citizens, who are 2 years of age or older, must have a negative COVID-19 test from within 1 day of boarding their flight.
- The CDC page on the testing requirement for air travelers
For the purposes of "1 day", the time of the test within a day does not matter. Either a NAAT test, such as a RT-PCR test, or an antigen test, including a rapid test, is acceptable.