The United States of America is the fourth largest country in the world.Its bigger than the whole of Europe, but it isnt the largest country in North America. Thats CANADA.In the Usa live 300 milion people. The largest city in the USA is New York.About 8 milion people live there.The second largest city is Los Angels in California and the third largest is Chacago.There are fifty states in the United States.