United States – 329 Million

The population of the United States is 329 million. It is the third most populous country in the world. America has a total area of 9,147,420 km², which is quite large compared to the other countries on the list.

The population density is 36 people per km², or 82.5% of the population lives in cities.
The most populous states are California and Texas. There are 39.5 million people in California and 28.7 million in Texas. New York is the largest city in the United States, with a population of approximately 8.4 million.

The US population is projected to grow to 438 million by 2050.