As of October 2023, US passport holders can travel visa free to 148 countries and territories:
Albania.
American Samoa.
Andorra.
Anguilla.
Antigua and Barbuda.
Argentina.
Armenia.
Aruba.
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Entry VisasTo enter Russia for any purpose, a U.S. citizen must possess a valid U.S. passport and a bona fide visa issued by a Russian Embassy or Consulate. It is impossible to obtain an entry visa upon arrival, so travelers must apply for their visas well in advance.