United States

The United States of America (USA), commonly known as the United States (U.S. or US) or America, is a country comprising 50 states, a federal district, five major self-governing territories, and various possessions. At 3.8 million sq mi (9.8 million km2), the United States is the world's third or fourth largest country by total area and is slightly smaller than the entire continent of Europe's 3.93 million sq mi (10.2 million km2). With a population of more than 327 million people, the U.S. is the third most populous country. Most of the country is located contiguously in North America between Canada and Mexico.