From the birth of the USA as a nation to the present, the population has grown steadily (without taking into account the period of civil war) has also received numerous waves of migration, which made it a nation with a cosmopolitan population.
At present, the population of the United States is 318 582 000 inhabitants, making it the third most populated country in the world. It is a very urbanized country, with 81% of the population residing in suburbs and cities as of 2014, while the global urbanization rate is 54%. California and Texas are the most populated states, while the average population center of the United States has been moving towards the southwest. New York is the most populated city in the United States.