Short Answer
America’s population growth slowed sharply in 2025, and the main reason was not fewer births or more deaths—it was a broad decline in net international migration. According to the U.S. Census Bureau’s Vintage 2025 population estimates released on January 27, 2026, the nation grew by just 0.5% between July 1, 2024, and July 1, 2025, down from 1.0% the previous year. Every state and the District of Columbia recorded lower net international migration, reshaping local demographic trajectories and highlighting how dependent many parts of the country have become on immigration for population growth.
Key Numbers
- U.S. population growth rate, 2024–2025: 0.5%
- U.S. population growth rate, 2023–2024: 1.0%
- U.S. population growth rate, 2022–2023: 0.8%
- States and D.C. with lower net international migration in 2025: 51 (all)
- Counties with a decline in net international migration: 90% of 3,144
- Counties with no change in net international migration: 10%
- Natural change (births minus deaths): remained relatively stable
- Net international migration in 2025: positive in all states and D.C., but lower than 2024
Explanation
Net international migration (NIM) is the annual estimate of people moving into the United States from abroad minus those leaving the country. It is one of three components of population change, along with natural change (births minus deaths) and net domestic migration (movement between states). When NIM falls, population growth slows unless offset by other components.
In 2025, the U.S. population growth rate dropped to 0.5%, the slowest since the COVID-19 pandemic. The Census Bureau attributed this slowdown primarily to a sizeable reduction in net international migration. Natural change remained relatively stable, meaning the decline in immigration was the decisive factor. This pattern was not isolated: every state and D.C. experienced a decline in NIM between 2024 and 2025, and 90% of the nation’s 3,144 counties saw a decline. The remaining 10% of counties had no change.
Importantly, a decline in NIM across years does not mean states had negative NIM. In fact, all states and D.C. still recorded positive—but lower—net international migration in 2025 than in 2024. The Census Bureau also implemented several changes that improved the accuracy of NIM estimates at the state and county levels, better reflecting recent changes in migration flows.
Definition
Net international migration is the difference between the number of people entering the United States from other countries and the number of people leaving the United States to live abroad. It includes immigrants, refugees, asylees, and temporary migrants, as well as U.S. citizens moving abroad. A positive NIM means more people are arriving than leaving; a negative NIM would mean the opposite. In 2025, all states and D.C. had positive NIM, but the size of that positive flow shrank compared with 2024.
National Comparison
Nationally, the slowdown was stark. After a brief post-pandemic uptick—0.8% growth in 2023 and a robust 1.0% in 2024—U.S. population growth fell to 0.5% between 2024 and 2025. The Census Bureau’s senior demographer Marc Perry explained the dynamic:
‘With natural change less of a contributor to growth than it used to be, some states—especially those without positive net domestic migration—are dependent on international migration for their population to grow.’
This quote underscores that immigration has become a demographic lifeline for many states, and a broad decline in NIM can quickly translate into slower overall growth.
State Comparison
The decline in net international migration was remarkably uniform. According to Census Bureau data released March 26, 2026, every state, the District of Columbia, and 90% of the nation’s 3,144 counties experienced a decline in NIM between 2024 and 2025. The remaining 10% of counties had no change. No state or county saw an increase in NIM during this period. However, because all states and D.C. still had positive NIM, the change represents a reduction in the size of immigration flows rather than a shift to net out-migration from abroad.
This broad pattern means that states that rely heavily on international migration to offset domestic out-migration or low natural increase were particularly exposed. While the Census Bureau did not release state-level NIM totals in the initial January 2026 release, the March 2026 county-level analysis confirmed that the slowdown was geographically widespread.
Year-over-Year Change
The following table summarizes the national year-over-year change in population growth and the associated trend in net international migration.
| Year | U.S. Population Growth Rate | Net International Migration Trend |
|---|---|---|
| 2022–2023 | 0.8% | Post-pandemic uptick |
| 2023–2024 | 1.0% | Robust, contributing to faster growth |
| 2024–2025 | 0.5% | Sizeable reduction; main driver of slowdown |
The 0.5 percentage point drop from 2024 to 2025 was the largest year-over-year slowdown in the post-pandemic period, and it coincided with a decline in NIM in every state.
Historical Data
The 2025 slowdown follows a period of demographic volatility. During the COVID-19 pandemic, international migration fell sharply, contributing to historically low population growth. As borders reopened and immigration rebounded, population growth accelerated to 0.8% in 2023 and 1.0% in 2024. The 2025 decline to 0.5% marks a return to slower growth, though it remains above the pandemic-era lows. The Census Bureau’s Vintage 2025 estimates incorporate revised migration data and methodological improvements, making the 2025 figures more accurate but also more sensitive to recent policy and flow changes.
Factors Behind the Trend
Several factors contributed to the decline in net international migration. The Brookings Institution’s analysis of the new Census data points to stricter immigration policies and expansive deportation efforts under the Trump administration, which led to a noticeable decline in immigrant arrivals and an increase in departures. At the same time, the Census Bureau implemented changes that improved the accuracy of NIM estimates at the state and county levels, better reflecting recent changes in migration flows. These methodological updates may have also contributed to lower reported NIM figures, as they more precisely capture the timing and volume of international moves.
Why It Matters
International migration is a critical driver of U.S. population growth, especially as natural increase—births minus deaths—has slowed. Many states and local communities depend on immigration to sustain labor forces, fill housing demand, support school enrollments, and maintain economic vitality. When NIM declines broadly, states that also lose residents to domestic migration may see population stagnation or decline. This has implications for political representation, federal funding allocations, and long-term economic planning. The 2025 data serve as a reminder that immigration policy and migration flows are not just national issues—they shape the demographic futures of every state and county.
Methodology
The U.S. Census Bureau produces annual population estimates for the nation, states, and counties as of July 1 each year. Net international migration is estimated using data on international arrivals and departures, including administrative records, survey data, and demographic analysis. For Vintage 2025, the Census Bureau implemented several changes that improved the accuracy of NIM estimates at the state and county levels. These changes better reflect recent migration flows and may result in lower NIM figures than previous vintages, even if actual migration did not change as much. The estimates are not full counts but are the official basis for population statistics between decennial censuses.
Limitations of the Data
Population estimates, including net international migration, are subject to revision as new data become available. The 2025 estimates reflect a specific methodology and may not capture all undocumented migration or temporary movements. A decline in NIM across years does not necessarily mean that a state lost more international migrants than it gained; it means the positive net flow was smaller. County-level data show that 10% of counties had no change, which may reflect small populations or estimation constraints rather than a true absence of migration. Users should interpret year-over-year changes cautiously, especially for small areas.
Source & Data Date
Primary source: U.S. Census Bureau, Vintage 2025 National and State Population Estimates, released January 27, 2026, and the follow-up county-level analysis on net international migration released March 26, 2026. Additional context from the Brookings Institution analysis published February 11, 2026. Data cover the period July 1, 2024, to July 1, 2025, with historical comparisons to 2023 and 2024.
FAQ
What is net international migration?
Net international migration is the annual estimate of people moving into the United States from abroad minus those leaving the country. It includes immigrants, refugees, asylees, temporary migrants, and U.S. citizens moving abroad. A positive value means more people arrived than left.
Did any state have negative net international migration in 2025?
No. According to the U.S. Census Bureau, all states and the District of Columbia still had positive net international migration in 2025. However, every state and D.C. experienced a decline in NIM compared with 2024, meaning the positive flow was smaller.
Why did U.S. population growth slow in 2025?
The main reason was a sizeable reduction in net international migration. Natural change—births minus deaths—remained relatively stable, so the decline in immigration was the decisive factor. The national growth rate fell from 1.0% in 2024 to 0.5% in 2025.
How does the Census Bureau calculate net international migration?
The Census Bureau estimates net international migration using data on international arrivals and departures, including administrative records, survey data, and demographic analysis. For Vintage 2025, the Bureau implemented methodological changes that improved accuracy at the state and county levels.
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