Population in the US
The population size of the United States of America is now almost 330 million, making it the third most populous country in the world after China and India. California, at almost 40 million people, has the highest number of inhabitants out of all states.
The US has experienced relatively rapid population growth for a developed country due to high immigration and birth rates, but as in other high-income countries, its fertility rate is now below replacement and continuing to decline.
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