Short Answer
The U.S. resident population reached an estimated 342.4 million in December 2025, continuing a long upward trajectory from just 3.9 million at the first census in 1790. Official Census Bureau estimates and historical series show that the country has added more than 338 million people over 235 years, with growth driven by natural increase and international migration. This article summarizes U.S. population by year, key milestones, and the methods behind the numbers.
Key Numbers
- 2025 resident population: 342.4 million (December 2025, CEIC/BEA year-end estimate)
- 2024 resident population: 341.0 million
- 2020 Census count: 331,449,281
- 1900 population: 76.1 million (CEIC year-end estimate)
- 1790 population: 3.9 million
- 2024–2025 increase: about 1.4 million, or 0.41%
- Long-term growth: population multiplied roughly 87 times from 1790 to 2025
- Data release: Census Bureau Vintage 2025, January 2026
Explanation
The U.S. Census Bureau produces annual population estimates for the nation, states, counties, and Puerto Rico. The most recent release, Vintage 2025, covers April 1, 2020, to July 1, 2025, and provides monthly and annual totals. These estimates are based on the 2020 Census and updated each year using data on births, deaths, and migration.
Population growth has not been uniform. Early U.S. history saw rapid expansion through high birth rates and large immigration waves. In the 20th century, growth continued but slowed after the baby boom. In recent years, annual increases have been modest, with the 2024–2025 change of about 1.4 million reflecting lower natural increase and continued net international migration.
Understanding population by year is essential for planning infrastructure, distributing federal funds, and analyzing economic and social trends. The figures below draw on the Census Bureau, the Historical Statistics of the United States, and CEIC data.
Definition
The resident population includes all people living in the 50 states and the District of Columbia, including armed forces stationed in the United States, but excludes U.S. citizens and military personnel living overseas. It also excludes Puerto Rico and other U.S. territories, which are reported separately. The total population including armed forces overseas is slightly larger than the resident population.
Historical tables often distinguish between total, resident, and civilian population. The civilian population excludes active-duty military personnel. Most modern Census Bureau national totals refer to the resident population.
Historical Data
The table below shows selected U.S. decennial census counts from 1790 to 2020, based on official Census Bureau records. These counts provide the benchmark for all annual estimates.
| Year | Population |
|---|---|
| 1790 | 3,929,214 |
| 1800 | 5,308,483 |
| 1820 | 9,638,453 |
| 1840 | 17,069,453 |
| 1860 | 31,443,321 |
| 1880 | 50,189,209 |
| 1900 | 76,212,168 |
| 1920 | 106,021,537 |
| 1940 | 132,164,569 |
| 1960 | 179,323,175 |
| 1980 | 226,545,805 |
| 2000 | 281,421,906 |
| 2020 | 331,449,281 |
More recent year-end estimates from CEIC show the population at 341.0 million in December 2024 and 342.4 million in December 2025. These figures show the long-term pattern: slow growth in the early republic, acceleration in the 19th and 20th centuries, and a large absolute increase in recent decades even as the growth rate has declined.
Year-over-Year Change
From December 2024 to December 2025, the U.S. population rose by about 1.4 million, from 341.0 million to 342.4 million. That is an annual growth rate of approximately 0.41%. While the absolute increase is substantial, the rate is well below the 1%+ annual growth common in the mid-20th century.
The Census Bureau’s Vintage 2025 release provides July 1 estimates for each year from 2020 to 2025. These annual estimates allow year-over-year comparisons that smooth out seasonal variation and align with the July 1 reference date used for most demographic statistics.
10-Year Change
Between the 2010 and 2020 decennial censuses, the U.S. resident population grew from 308,745,538 to 331,449,281, an increase of 22,703,743, or 7.4%. That was the second-slowest decade of growth since the 1930s, reflecting lower fertility, aging, and reduced immigration during the 2010s.
| Period | Start Population | End Population | Change | Percent Change |
|---|---|---|---|---|
| 2010–2020 | 308,745,538 | 331,449,281 | +22,703,743 | +7.4% |
| 2020–2025 | 331,449,281 | 342,400,000 | +10,950,719 | +3.3% |
The 2020–2025 change is a five-year change, not a full decade, but it shows that growth has continued at a modest pace in the early 2020s.
Population Change
Population change has two main components: natural increase (births minus deaths) and net international migration (immigration minus emigration). In recent years, natural increase has fallen as birth rates have declined and deaths have risen with an aging population. Net international migration has therefore become a larger share of total growth.
- Natural increase: births minus deaths; historically the largest driver of U.S. growth.
- Net international migration: the difference between people moving into and out of the country.
- Other adjustments: changes in the number of U.S. residents in Puerto Rico and other territories are not included in the national resident total.
Factors Behind the Trend
Several long-term factors explain the U.S. population trajectory. In the 19th century, high fertility and large-scale European immigration drove rapid growth. The 20th century saw the post-World War II baby boom, followed by declining fertility after the 1960s. More recently, the aging of the baby-boom generation has increased deaths, while immigration policy and economic conditions have shaped migration flows.
The COVID-19 pandemic also affected population change in 2020 and 2021, reducing life expectancy and disrupting international migration. By 2024 and 2025, migration had rebounded, contributing to the 1.4 million increase.
How the Statistic Is Calculated
The Census Bureau uses a cohort-component method to produce annual population estimates. The process starts with the most recent decennial census count, then updates it each year by:
- Adding births to the population.
- Subtracting deaths.
- Adding net international migration.
- Adjusting for changes in the population living in group quarters and other residence changes.
The Vintage 2025 estimates use the 2020 Census as the base and incorporate data from birth and death certificates, tax records, and migration surveys. The Bureau of Economic Analysis also produces year-end population figures, which CEIC reports; these may differ slightly from Census July 1 estimates because of timing and methodology.
Limitations of the Data
Population estimates between censuses are subject to revision as new data become available. Decennial censuses themselves can have undercounts or overcounts, particularly for certain demographic groups. The COVID-19 pandemic created additional challenges for the 2020 Census and for post-2020 estimates.
Users should treat annual estimates as best-available approximations rather than exact counts. The next decennial census in 2030 will provide a new benchmark and likely lead to revisions of the 2020s estimates.
State Comparison
Although this article focuses on national totals, the Census Bureau also publishes state-level population estimates. The 2020 Census showed that the five largest states by population were California, Texas, Florida, New York, and Pennsylvania, while the five smallest were Wyoming, Vermont, Alaska, North Dakota, and South Dakota.
| Rank | Largest States (2020 Census) | Population | Smallest States (2020 Census) | Population |
|---|---|---|---|---|
| 1 | California | 39,538,223 | Wyoming | 576,851 |
| 2 | Texas | 29,145,505 | Vermont | 643,077 |
| 3 | Florida | 21,538,187 | Alaska | 733,391 |
| 4 | New York | 20,201,249 | North Dakota | 779,094 |
| 5 | Pennsylvania | 13,002,700 | South Dakota | 886,667 |
State population rankings can shift over time as migration and economic conditions change. The Census Bureau’s Vintage 2025 state estimates provide updated figures for July 1, 2025.
Why It Matters
Population totals by year are more than just numbers. They determine congressional apportionment, guide the distribution of hundreds of billions of dollars in federal funds, and inform business, housing, and infrastructure decisions. Accurate annual estimates help policymakers and researchers track demographic shifts, plan for schools and hospitals, and understand the changing needs of communities.
Source & Data Date
Primary sources: U.S. Census Bureau, National Population Totals: 2020-2025 (Vintage 2025, released January 2026); Historical Statistics of the United States Millennial Edition Online, Table Aa6-8; CEIC Data, United States Population 1900–2025; and Macrotrends, U.S. Population Historical Data. The 2020 Census count is from the official 2020 Census. Year-end 2024 and 2025 population figures are from CEIC/Bureau of Economic Analysis data.
FAQ
What was the U.S. population in 2025?
According to CEIC/Bureau of Economic Analysis year-end data, the U.S. resident population was 342.4 million in December 2025. The Census Bureau's Vintage 2025 July 1 estimate is also around 342 million.
How does the Census Bureau calculate annual population estimates?
The Census Bureau uses a cohort-component method. It starts with the most recent decennial census count, adds births, subtracts deaths, adds net international migration, and adjusts for residence changes. Vintage 2025 uses the 2020 Census as the base.
What was the U.S. population in 1900?
The 1900 decennial census counted 76,212,168 people. CEIC year-end data reports 76.1 million for December 1900.
How much did the U.S. population grow from 2024 to 2025?
The population grew by about 1.4 million, from 341.0 million in December 2024 to 342.4 million in December 2025, an annual growth rate of approximately 0.41%.
What is the difference between resident population and total population including armed forces overseas?
The resident population includes armed forces stationed in the United States but excludes U.S. military and civilian government employees living overseas. The total population including armed forces overseas is slightly larger.
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