KAMALA HARRIS EXPLAINS: THE UNITED STATES OF AMERICA. The United States is a country in between Canada and Mexico. Canada is on one side of the United States and on the other side of the United States is Mexico. Canada, Mexico, and the United States make up the continent North America - which is where the United States of America gets it's name. The States of America are made up of 50 States of America - that are United. These States have counties in the state that separate the state into districts of the state. Those counties can have many cities and townships in the counties - as cities are parts of counties - and the counties are parts of the states - 50 which make up the United States of America, a country that borders Canada and Mexico. Those three countries which make up North America - the continent.