- The United States of America (USA) is a country comprising 50 states, a federal district, five major self-governing territories, and various possessions.
- At 3.8 million square miles (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 3.9 million square miles (10.1 million km2).
- With a population of over 327 million people, the U.S. is the third most populous country.
- The capital is Washington, D.C., and the most populous city is New York City. Forty-eight states and the capital's federal district are contiguous in North America between Canada and Mexico.
- The U.S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The extremely diverse geography, climate, and wildlife of the United States make it one of the world's 17 megadiverse countries.
- The United States emerged from World War II as a global superpower, the first country to develop nuclear weapons, the only country to use them in warfare, and a permanent member of the United Nations Security Council.
- The United States is the foremost military power in the world, making up a third of global military spending, and is a leading political, cultural, and scientific force internationally
- Although its population is only 4.3% of the world total, the U.S. holds 31% of the total wealth in the world, the largest share of global wealth concentrated in a single country.
- The United States is the world's oldest surviving federation. It is a representative democracy, "in which majority rule is tempered by minority rights protected by law".
- Republican Donald Trump, the winner of the 2016 presidential election, is serving as the 45th president of the United States alongside his Republican Vice President Mike Pence.