You must have a U.S. passport valid beyond your planned departure date, proof of an onward or return ticket, and sufficient funds to cover the cost of the length of stay. If you enter Belize by land, you will be charged different fees depending on if you are staying for less than or more than 24 hours. Belize does not require specific immunizations for visitors; vaccinations recommended by the Centers for Disease Control can be found at Belize vaccinations.
If you are visiting as a tourist, you do not require a visa. Visitors planning to stay more than 30 days must have their passport re-stamped by a local immigration office and pay an additional fee for every additional month they wish to stay up to 6 months; for stays longer than 6 months, you may need to provide further documentation to the local immigration office to explain the reason for a longer stay and pay additional fees. Visit the Embassy of Belize to the United States website for the most current visa information.
Traveling with Minors: If you are traveling with children, you may be asked by immigration officials to show U.S. birth certificates for each child. When children are not traveling with both parents, immigration officials often request documentation to establish the children are traveling with the permission of both parents. Such documentation may include notarized letters from the parent(s), custody or adoption papers, or death certificates in situations where one or both parents are deceased.