The country of Mexico borders the US to the south.
Canada in the north and Mexico in the south have land borders with the US.
As far as land borders, there are only two: Canada on the north and Mexico on the south.
On land, the US borders only Canada (north or east) and Mexico (south). The US islands of Hawaii, and territories in the Pacific and the Caribbean may have sea borders with other nations. The major sea borders of the continental US are Russia (west of Alaska), the Bahamas (east of Florida), and Cuba (south of Florida).
Mexico is located just south of the United States.
Directly bordering it? That would be Mexico. Other countries south of the US but not directly touched by its land borders would also include The Bahamas and Cuba.
Mexico is the only country which borders the US to the south & Canada borders to the North.
Canada borders the north, Mexico borders the south.
Mexico borders the US on the south and Canada on the north.
Mexico is the closest country south of the US, as it borders the US to the south.
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