The continental US borders both Mexico and Canada. However, it has many countries close to its borders, less than 100 kilometers (62 miles) away from American soil, such as Russia across the Bering Strait, or the Bahamas and Cuba, close to Florida in the Caribbean Sea. Also, if you count Puerto Rico as part of America, some more countries enter this classification, such as the Dominican Republic or Haiti.
Canada and Mexico both border the United States of America.
Canada and Mexico both border the US. The Caribbean countries as well as the Central American ones are also fairly close.
Geographically speaking, Canada, Mexico, Cuba, and Russia. Alliance wise, Australia, Mexico, UK, and Canada.
The two countries closest to the US are Canada and Mexico, which share common borders with the US.
The United States is between Mexico and Canada
Mexico
Canada of course: it has territories close to the Arctic circle.
Tierra del Fuego, shared by Argentina and Chile and close to Antractica.
Canada
Greenland.
Hollywood is located in the United States, specifically in California. The nearest country to the U.S. is Canada to the north and Mexico to the south. Depending on the context, both countries are relatively close, with Mexico being the nearest at approximately 1,900 miles from Hollywood.
The U.S. or Russia