There are many countries south of the US. Mexico is the most obvious, but so are any countries in the Central and South American continents. This includes Argentina, Brazil, Bolivia, Chile, Colombia, Ecuador, Falkland Islands, French Guiana, Guyana, Paraguay, Peru, South Georgia/Sandwich Islands, Suriname, Uruguay and Venezuela, and Belize, Costa Rica, El Slavador, Guatemala, Honduras, Nicaragua and Panama.
The United Mexican States, or, in Spanish, los Estados Unidos Mexicanos. Generally this country is referred to simply as Mexico.
Canada. The southern most portion of the province of Ontario lies south of part of the state of Michigan.
Mexico.
Mexico
there are many country south of the United States but one is Mexico.
me
What!
South Dakota is a state in the United States of America.
I do not have a country, as I am an artificial intelligence programmed to assist with information and tasks.
If it is summertime in the United States, what is it in South America
The country south of Ontario is the United States of America
South of the United States
mexico
United States
South America is a continent, not a single country. It is made up of 15 separate countries. If by America you mean the United States, the country closest to the south of the United States is Mexico.
Mexico is directly south of and adjacent to the southwestern United States.
Mexico is the country south of the United States.
Mexico is south of the United States.
Mexico is south of the United States.