Only one: the United States of America.
Do you mean countries? If you do, the two countries that border the U.S. are Canada and Mexico.
The USA (United States of America) borders Mexico in the north Guatemala & Belize border Mexico in the south.
The two countries that border the US is Canda (to the north of the US), and Mexico (to the south of the US).
Canada in the north, and Mexico in the south.
Both the United States and Mexico.
Canada and Mexico border the United States.Canada and Mexico.
US borders Mexico to north and Guatamala and Belize on south
Canada and Mexico border the United States in the North and South respectively. There are no other countries bordering the United States.
North: USA South: Guatemala and Belize
Mexico in the south, and Canada in the north, both share their border with the USA.
What two COUNTRIES border North and South America. Technically, Mexico is in Central America, so the answer to the question is: Mexico borders North America, and Panama borders South America. Some consider Mexico to be a part of North America, which is technically incorrect, but in that case, then there are three countries that border North and South America: Panama borders South America, and Belize and Guatemala border North America (Mexico).
The only two countries with land borders with the US are Canada to the north and Mexico to the south.