How many Americans are there? It is one of those questions that sounds simple until you try to answer it precisely. The short answer: the population of the United States is roughly 340 million people, based on the U.S. Census Bureau’s estimates for 2024 and 2025. That makes the United States the third most populous country in the world.
But that number is never exact for long. Every day, thousands of babies are born, thousands of people pass away, and thousands more move into or out of the country — so the total ticks up or down constantly. In this article, we will look at the current estimate, where the number comes from, how it has changed over time, and where you can check the latest figure yourself.
The Short Answer: How Many Americans Are There?
As of the Census Bureau’s most recent estimates (late 2024 into 2025), the resident population of the United States is about 340 million. The 2020 census counted 331.4 million people, and the population has grown by roughly 2 to 3 million per year since then through a combination of births and immigration.
To put it simply: if someone asks ‘how many Americans are there,’ answering ‘about 340 million’ is accurate for 2025. But check the U.S. Census Bureau for the latest estimate, because the figure is always moving.
Where the Number Comes From
The official population count comes from the U.S. Census Bureau, the federal agency responsible for counting every person living in the country. There are two main sources:
- The decennial census — a full headcount conducted every ten years (most recently in 2020). This is the most complete count and the basis for congressional representation.
- Population estimates — updated figures released between censuses, based on birth and death records, immigration data, and other administrative records. These are the numbers you see quoted in the news most years.
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The Census Bureau also runs a population clock — a live estimate that ticks upward in real time based on projected rates of births, deaths, and migration. It is a projection, not a live headcount, but it gives a vivid sense of how the population grows moment by moment.
US Population Over the Years
The United States has grown enormously over the past century. Here are approximate milestones:
| Year | Approximate population |
|---|---|
| 1900 | 76 million |
| 1950 | 151 million |
| 1980 | 227 million |
| 2000 | 282 million |
| 2010 | 309 million |
| 2020 (census) | 331 million |
| 2024 (estimate) | 340 million |
The country passed 100 million around 1915, 200 million in 1967, and 300 million in 2006. Growth has slowed in recent decades — the 2010s saw the slowest decade of growth since the 1930s — but the total keeps climbing. For deeper historical context, the demographics of the United States page tracks these trends in detail.
What Counts as an ‘American’?
This is worth clarifying, because the number changes depending on what you mean:
- Residents of the 50 states and Washington, D.C. — this is what the headline ‘340 million’ figure refers to. It includes citizens, legal residents, and undocumented residents alike, because the census counts everyone living in the country.
- U.S. citizens worldwide — Americans living abroad are generally not included in the resident population count.
- U.S. territories — places like Puerto Rico (about 3.2 million people), Guam, and the U.S. Virgin Islands are counted separately from the 50-state total.
So when news reports say ‘how many Americans’ and give the 340 million figure, they mean people residing in the fifty states plus the District of Columbia.
How the US Compares to Other Countries
With roughly 340 million people, the United States is the third most populous country in the world, behind India (about 1.4 billion) and China (about 1.4 billion). It is well ahead of fourth-place Indonesia (about 280 million). The U.S. holds about 4 percent of the world’s roughly 8 billion people — a small share of global population, which makes the country’s economic and cultural footprint all the more notable.
Where Americans Live
Americans are not spread evenly across the map. A few facts about where the 340 million live:
- The biggest states: California (about 39 million), Texas (about 31 million), and Florida (about 23 million) are the three most populous states. Together they hold more than a quarter of all Americans.
- Mostly urban: more than 80 percent of Americans live in urban areas. The New York, Los Angeles, and Chicago metro areas alone account for tens of millions of people.
- The South and West keep growing: recent decades have seen steady population movement toward the Sun Belt, while some Northeastern and Midwestern states have grown slowly or lost residents.
Why the Number Keeps Changing
Three things move the total every single day:
- Births — roughly 3.6 million babies are born in the U.S. each year.
- Deaths — roughly 3 million deaths occur each year.
- Migration — net immigration adds roughly 1 million or more people per year, and in recent years it has been the largest driver of U.S. population growth.
When births plus immigration exceed deaths, the population grows — which has been the case every year in American history. The rate of growth has slowed, but the direction has not changed.
How to Check the Latest Figure Yourself
Because the number moves constantly, the best answer to ‘how many Americans are there’ is always the freshest one. Here is where to look:
- Visit census.gov — the Census Bureau’s official site.
- Find the population clock for a live estimate of the current U.S. (and world) population.
- Check the latest vintage population estimates release for the official annual figure with detailed breakdowns by state, age, and more.
Any figure you see quoted — including the ‘340 million’ in this article — is a snapshot. For school projects, business plans, or trivia nights, always cite the date of the estimate alongside the number.
Quick Population Trivia
A few interesting facts that put the 340 million figure in perspective:
- According to the Census Bureau’s population clock, the United States gains roughly one net new person about every 15 seconds, once births, deaths, and migration are combined.
- The 300-million milestone was passed in October 2006 — meaning the country added roughly 40 million people in under two decades.
- If the U.S. population stood shoulder to shoulder, it would still cover only a fraction of Texas — but housing, feeding, and employing 340 million people takes the entire country.
- The U.S. is the only high-income country among the world’s five most populous nations, a fact demographers often point to when explaining its economic scale.
FAQs About How Many Americans There Are
How many Americans are there in 2025?
Based on Census Bureau estimates, roughly 340 million people live in the United States in 2025. The exact figure depends on the month of the estimate.
Is the US population growing or shrinking?
Growing — but more slowly than in the past. Net immigration is now the main driver of growth, as the gap between births and deaths has narrowed.
What was the US population in 2020?
The 2020 census counted 331,449,281 residents — often rounded to 331.4 million.
What percentage of the world is American?
About 4 percent. The U.S. has roughly 340 million of the world’s roughly 8 billion people.
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