I have determined to partially restrict and limit the entry of nationals of the following 15 countries: Angola, Antigua and Barbuda, Benin, Cote d 'Ivoire, Dominica, Gabon, The Gambia, Malawi, Mauritania, Nigeria, Senegal, Tanzania, Tonga, Zambia, and Zimbabwe.
Quoted from the source.
Before you go
The conditions that come with this rule, from its official sources.
Conditions from official sources
Entry on a B-1 or B-2 visitor visa is suspended unless the traveler held a valid U.S. visa on January 1, 2026, travels as a dual national on another country's passport, or gets a case-by-case national-interest exception.
Passport validity
The source states no minimum passport validity.
Tourist entry only
These rules cover tourist visits. Work, study and transit follow other rules.
The other way round
What United States passport holders need to visit Gabon.
United States passport Gabon
No tourist entry
On December 18, the Gabonese Council of Ministers announced, via local media, that Gabon would apply reciprocal measures suspending visa issuance to U.S. citizens.