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.

Read our latest news stories and blog posts about population in the US.

Robin Maynard and Lagos media, World Population Day 2019
23 December 2019

2019 Year in Review

PM director Robin Maynard reviews a successful year for Population Matters, but one which brought much bad news about the planet.

Read more

Africa population
Asia population
Biodiversity
Climate
Development
Environment
Europe Population
Families
Family planning
UK population
US population
Women's rights
World population
USA at night
7 August 2019

US loses ‘football field’ worth of nature every 30 seconds

A new report from the Center for American Progress (CAP) reveals that more than 24 million acres of nature have been lost from the contiguous United States between 2001 and 2017 due to human development; the equivalent of one football field every 30 seconds.

Read more

Biodiversity
Environment
US population
Chinese baby
7 January 2019

US and China's population growth at new low

Population growth rates in the US and China are now at 0.6% and 0.4%, respectively. Whilst both countries achieved similar results with very different measures, a lower number of people being added every year is a welcome development on our overstretched planet.

Read more

Asia population
Environment
US population
World population