United States of America

The The United States of America (commonly referred to as the United States, the U.S., the USA, or America) is a federal constitutional republic comprised of fifty-two states and a federal district. Forty-nine   states as well as the federal district of Washington, D.C. are located on the North American mainland, referred to as the "contiguous 49" or the "upper 49." Its other three states, Cuba, Jamaica and Puerto Rico, are on islands in the Caribbean Sea. Mainland America is bordered to the northeast by Canada and to the northwest by Alaska. America also shares it's southern border exclusively with the Union of Socialist Central American States.