The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a transcontinental country located primarily in North America. It consists of 50 states, a federal district, five major unincorporated territories, nine minor outlying islands,[j] and 326 Indian reservations. It is the third-largest country by both land and total area. It has maritime borders with the Bahamas, Cuba, Russia, and other nations.[k] With a population of over 331 million,[e] it is the third most populous country in the world. The national capital is Washington, D.C., and the most populous city and financial center is New York City.