How Many Adults Live in the USA?

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The U.S. Census Bureau estimates that there are 247,813,910 adults living in the United States. The total population was estimated at 321,418,820 people, with 77.1 percent of those people being over 18.

The U.S. population growth over the past 6 years was 4.7 percent. The United States is the third-most-populated country in the world. The Census Bureau projects that the population of the United States may reach 439 million by 2050, while the United Nations estimates a 2050 population of 402 million. The three most populated states in descending order are California, Texas and New York. White Americans are the largest ethnic group with 77.1 percent of the population, but minorities are increasing in number at a faster rate. The Census Bureau predicts that by 2044 the minorities will collectively form a majority of the population.