The United States of America is a country on the continent of North America. The United States has grown from 13 states in 1776. The United states of America consists of the following 52 states. Capital city is Washington D. C. The US president lives there in the White house. The United States of America is the fourth largest country in the world. It is bigger than the whole of Europe. An area of USA is 9,631,418 square kilometers. There are five time zones in the USA. So, when it is twelve o´clock in Alaska. The third longest river in the world is in the USA. It´s the Mississippi. The USA is the richest country in the world. It produces more food, iron, cars, planes boks, films, music and TV programs than any other country in the world. The USA has a population of about 260 million people. Most of them live in cities. The largest city in the USA is New York. About 8 million people lives there. The second largest city is Los Angeles in California and the third largest is Chicago. There are fifty states in the United States.