No - A visa is not required for travel to Andorra

Sunday, March 24, 2019

The Principality of Andorra does not require any type of visa.
Note: Andorra is not a member of the Schengen Area. Access to Andorra is made through France or Spain. Any national from a third-country traveling to Andorra must get information from the French or Spanish Consulates (depending on the country of entrance) about the need of a Schengen visa.

A national from a country outside the European Union must have a two or multiple-entry Schengen visa.

Register your trip with the US Embassy:

The US State Department strongly encourages American citizens planning international travel to register with the US Embassy(s) in the countries they plan to visit. For just $20.00 per traveler, Travisa will complete the State Department Registration for the applicant. Official notifications about travel advisories and warnings will be sent to the traveler registered.

Click here to register your trip with the US Embassy in Andorra