Canada and Mexico .
There are no counties that border the United States, but there are two countries that border the U.S. They are Canada and Mexico.
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Canada and Mexico .
Do you mean countries? If you do, the two countries that border the U.S. are Canada and Mexico.
There is no country with only a US border. Canada has a major land border with the US, but it has sea borders with Greenland (an autonomous territory of Denmark) and the French islands of St. Pierre and Miquelon. It is also separated from other countries by the Arctic Ocean.
There are currently fifteen counties in the US state of Arizona. However, when the state was formed it was originally divided into 13 counties.
There is no country with only a US border. Canada has a major land border with the US, but it has sea borders with Greenland (an autonomous territory of Denmark) and the French islands of St. Pierre and Miquelon. It is also separated from other countries by the Arctic Ocean.
only someone with a valid passport can enter the us ===================================== An "enhanced" driver's licence can be used for land crossings from Canada.
Hawaii.
Alaska
Canada does,