No, the full name of Mexico is the United Mexican States, with a territory area of 65,438+0,964,400 square kilometers. It is the third largest country in Latin America, ranking 14 in the world, located in the south of North America and the northwest end of Latin America. The full name of the United States is the United States of America, the capital of Washington. Located in central North America, it borders Canada in the north, the Gulf of Mexico in the south, the Pacific Ocean in the west and the Atlantic Ocean in the east. So Mexico and the United States are two different countries, and there is no affiliation between Mexico and the United States. So Mexico does not belong to the United States.