If you will be traveling to Costa Rica from South America and/or sub-Saharan Africa, you will need the Yellow Fever Vaccine. The countries considered at risk are: Angola, Benin, Burkina Faso, Cameroon, Democratic Republic of Congo, Gabon, Gambia, Ghana, Guinea, Liberia, Nigeria, Sierra Leone, Sudan, Bolivia, Brazil, Colombia, Ecuador, Peru, Guyana and Venezuela.
Citizens of United States of America must have a returning ticket to exit Costa Rica (must show entry and exit of the country). The United States of America passport must also be valid for a minimum of one day from the day you enter Costa Rica.
Costa Rica Exit Tax. Please note that there is a $29 USD departure tax payable at the aiport with USD/Costa Rican cash or VISA, Matercard or American Express. This tax must be paid before you check in for your flight.
Costa Rica tourist visa is not required for citizens of United States of America for a stay up to 90 days.