Mexico
The closest place to the southern US border is Mexico, which happens to be in North America, just like the US is. The continent that borders North America is South America.
Mexico!!!! There is a common international border between the two nations.
The closest southern neighbor would be Mexico.
Border? It is on the southern US border.
The city in Alabama closest to the Florida border is Flomaton. It is located in the southern part of Alabama and shares a border with Florida.
Florida
The Country that shares the southern Border with the US is Canada.
Mexico is the southern country that is the closest neighbor to the United States. Mexico has a border with the United States that has a total length of 1954 miles.The country is Mexico.
The southern border of the US is primarily located along the countries of Mexico.
Mexico is the country on the southern border of the United States.
The closest Canadian city to the US border is Surrey, located in British Columbia. It is part of the Greater Vancouver area and shares a border with the US state of Washington.