To enter Tanzania as a US citizen, you typically need the following:

1. Passport: Your passport must be valid for at least six months beyond the date of entry and have at least one blank visa page. 2. Visa: US citizens are required to obtain a tourist visa upon arrival in Tanzania. This can be obtained at the point of entry, such as airports or land borders. The visa fee is payable in cash, typically in US dollars. However, it’s always wise to check for any updates or changes to visa requirements before traveling.

3. Yellow Fever Vaccination: If you are traveling from a country where yellow fever is endemic, you will need to present a yellow fever vaccination certificate upon arrival. This requirement also applies if you have traveled through a yellow fever endemic country within the past 14 days.