Entry / Exit Requirements for U.S. Citizens: U.S. citizens need a valid passport to enter Argentina. U.S. citizens with expired or damaged passports may not be allowed to enter and could be sent back to the United States at their own expense. Diplomatic or official passport holders must get visas prior to arrival. Private U.S. citizens do not need a visa for visits of up to 90 days for tourism or business.
Special Entry / Exit Requirements for Dual Nationals: Different rules may apply to dual U.S.-Argentine citizens, depending on when they became U.S. citizens. Visit the Argentine Ministry of the Interior website for the most current information.
Special Entry / Exit Requirements for Minors: Children under 18 who live in Argentina and are not traveling with both parents must have the notarized consent of both parents to leave Argentina (see international parental child abduction for more information). Visit the Argentine Department of Immigration website for more information.
HIV/AIDS Restrictions: The U.S. Department of State does not know of any HIV/AIDS entry restrictions for foreign visitors or residents of Argentina.
Information from travel.state.gov on Jan 22, 2018