The southern border of North America is the Atrato River, the Quito River, the Raspadura Gorge, and the San Juan River, all in Colombia. The part of Choco Province north of these rivers is really part of North America. Colombians born north of these streams would be surprised to know that they are really Norteamericanos. They were going to build an interoceanic canal here at one time; they may still do so in the future. The Panamanian border is nothing, just a line drawn by Teddy Roosevelt. Don't let anyone tell you that that's the continental border, because it's not. Only the ignorant think so, and the dilettantes who turn one page of a geography book and think they're experts. There's millions of those. I see them answering questions here all the time. Once again, the North America-South America border is the Atrato, Quito, and San Juan Rivers in Colombia. Look at a map, you'll see. No river, no border.
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 is technically part of North America, so it's southern neighbours, Guatamala and Belize are located at the southern border of North America.
Antartica
Mississippi's southern border is further south than Georgia's southern border. Georgia's southern border is 30.356 degrees north. Mississippi's southern border is 30.12 degrees north.
The US state of South Dakota is the southern border of North Dakota.
North America ends at the southern border of Mexico with Guatemala and Belize; South America starts at the border of Panama with Colombia. Guatemala, Belize, Honduras, Nicaragua, Costa Rica, and Panama are considered Central America, although they can be considered as part of North America. When they are, the border between the continents is the Panama-Colombia border. Although the Panama Canal is technically the water link that divides the continents, it is entirely within Panama, which would be Central or North America.
North America ends at the southern border of Mexico with Guatemala and Belize; South America starts at the border of Panama with Colombia. Guatemala, Belize, Honduras, Nicaragua, Costa Rica, and Panama are considered Central America, although they can be considered as part of North America. When they are, the border between the continents is the Panama-Colombia border. Although the Panama Canal is technically the water link that divides the continents, it is entirely within Panama, which would be Central or North America.
no Asia did not share a border with North America look at where it is
in north america.
California is North of California's southern border, and Oregon is North of California's northern border.
If the question means USA for America then Mexico is on the southern border of the USA.
klol