How Fast Is the U.S. Population Growing? 2025 Estimates Show Sharp Slowdown

The United States added about 1.8 million people between July 1, 2024, and July 1, 2025, a growth rate of 0.5% and the slowest annual pace since the early COVID-19 pandemic. The sharp slowdown follows a 1.0% increase in 2024 and is driven mainly by a historic drop in net international migration, according to the U.S. Census Bureau’s Vintage 2025 population estimates. As of July 2026, the national population clock put the U.S. population at roughly 342.7 million.

Key Numbers

• 0.5% — U.S. population growth rate, July 2024–July 2025
• 1.8 million — people added to the U.S. population over the year
• 342,684,908 — U.S. population on July 22, 2026, per the Census population clock
• 1.3 million — net international migration in 2024–2025, down from 2.7 million a year earlier
• 54% — decline in net international migration from the prior year
• 500,000+ — natural increase (births minus deaths) during the period
• 0.2% — growth rate in 2021, the slowest in recent history
• 1.0% — growth rate in 2024, the fastest since 2006
• One person every 28 seconds — net gain on the U.S. population clock in July 2026

Explanation

Population growth in the United States is the sum of two components: natural increase and net international migration. Natural increase is the number of births minus deaths, while net international migration is the number of people moving into the country from abroad minus those leaving. In recent years, immigration has been the main engine of U.S. population growth, helping the country grow even as birth rates remain relatively low.

In 2024, net international migration added about 2.7 million people, pushing the annual growth rate to 1.0% — the fastest since 2006. But in the July 2024–June 2025 period, net migration fell to 1.3 million, a decline of 54%. At the same time, natural increase held steady at just over 500,000. The result was a growth rate of 0.5%, the slowest since 2021, when the population grew by only 0.2% during the early pandemic period.

The Census Bureau’s population clock, accessed in July 2026, shows the current pace of change: one birth every 8 seconds, one death every 11 seconds, and one net international migrant every 100 seconds. That produces a net gain of one person every 28 seconds. These rates are projections, not exact counts, but they illustrate how births, deaths, and migration combine to shape the population.

Definition

The population growth rate is the percentage change in a population over a specific period, usually measured from July 1 of one year to July 1 of the next. The U.S. Census Bureau publishes annual Vintage population estimates that break growth into natural increase (births minus deaths) and net international migration (immigration minus emigration). These estimates cover the nation, states, counties, and other areas.

Historical Data

Recent annual growth rates show a sharp swing. The table below summarizes the most recent years for which comparable Census Bureau estimates are available.

The 2024 estimates put the U.S. population at about 340 million; the 2025 estimates put it at nearly 342 million.

Year-over-Year Change

The change from 2024 to 2025 was dramatic. In 2024, the country added 3.2 million people and grew by 1.0%. In 2025, it added 1.8 million and grew by 0.5%. The main difference was net international migration:

• 2023–2024 net international migration: 2.7 million
• 2024–2025 net international migration: 1.3 million
• Decline: 54%
• Natural increase: just over 500,000 in both periods, relatively stable

Factors Behind the Trend

The slowdown is largely attributed to a sharp reduction in immigration. The Associated Press reported that President Donald Trump’s immigration crackdown contributed to the year-to-year drop in the growth rate. The Population Reference Bureau noted that international migration fell 54%, leading to the nation’s slowest rate of growth since 2021.

The slowdown in U.S. population growth is largely due to a historic decline in net international migration, which dropped from 2.7 million to 1.3 million in the period from July 2024 through June 2025. — Christine Hartley, U.S. Census Bureau

Births and deaths remained relatively stable, so natural increase did not offset the migration decline.

State Comparison

Among states, South Carolina grew fastest in 2025, according to the Population Reference Bureau’s analysis of the Census Bureau data. State-level population change reflects a mix of domestic migration, international migration, and natural increase. The full Vintage 2025 state estimates provide detailed rankings, but the available sources highlight South Carolina as the top-growth state for the year.

National Comparison

The United States remains the third most populous country in the world, behind India and China. According to the Census Bureau’s international population clock for July 1, 2026, India’s population was about 1.43 billion, China’s about 1.41 billion, and the United States’ about 342.6 million. The U.S. growth rate, while slowing, still keeps it well ahead of most other high-income countries.

Ranking Table

The table below shows the ten most populous countries as of July 1, 2026, based on U.S. Census Bureau international estimates.

Methodology

The U.S. Census Bureau produces annual population estimates by starting with the most recent decennial census and then adding births, subtracting deaths, and accounting for net international migration. The Vintage 2025 estimates cover July 1, 2024, to July 1, 2025. The population clock is a separate real-time projection that applies current birth, death, and migration rates to the latest estimate. Both are updated as new data become available.

Why It Matters

Population growth affects nearly every aspect of American life. It influences congressional apportionment and the distribution of federal funds, shapes demand for housing, schools, and infrastructure, and helps determine the size of the labor force. A sharp slowdown driven by lower immigration can signal tighter labor markets, slower economic growth, and an older age structure over time.

Limitations of the Data

Net international migration is the most difficult component to measure precisely, and annual estimates are often revised in later vintages. The population clock is a projection, not an official count, and can differ from the annual July 1 estimates. State-level comparisons may also be affected by changes in methodology or data sources. Readers should treat the 2025 figures as the best available estimates as of the January 2026 release.

Source & Data Date

Primary source: U.S. Census Bureau, Vintage 2025 population estimates, released January 27, 2026. Additional data from the Census Bureau Population Clock accessed July 23, 2026; AP News reporting on the Census release; and the Population Reference Bureau analysis of the same data.