President Trump promised to restore control of America’s border and immigration system. New population data now point to a reversal so large that it would have sounded impossible during the Biden border crisis.

The nation’s foreign-born population fell by an estimated 2.9 million people between January 2025 and July 2026, according to a new analysis of federal household-survey data.

This is an outright decline following years in which millions of additional migrants entered and remained in the United States.

THE ILLEGAL-IMMIGRANT ESTIMATE FELL BY 2.3 MILLION

The Center for Immigration Studies examined the Census Bureau’s monthly Current Population Survey and estimated that the total foreign-born population declined from roughly 53.3 million when President Trump returned to office to about 50.5 million in July 2026.

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The “foreign-born” category is broader than the illegal-immigrant population. It includes naturalized American citizens, lawful permanent residents, foreign students and other long-term temporary visitors, as well as people in the country illegally.

CIS preliminarily estimates that the illegal-immigrant population accounted for most of the decline, falling by about 2.3 million — from 15.8 million in January 2025 to 13.5 million in July 2026.

The remaining decline came from the legal foreign-born population, which the analysis put at roughly 600,000.

A HISTORIC TURN AFTER THE BIDEN SURGE

The scale of the turnaround becomes clearer when compared with the four years before President Trump returned to the White House.

CIS says the foreign-born population increased by roughly 8.3 million during the post-COVID border surge. In only 18 months under President Trump, more than one-third of that increase appears to have been reversed.

The organization also concluded that net migration — arrivals minus departures — was negative over the period. If that conclusion holds, it would mark the first sustained net decline since the 1930s.

The change reflects more than formal deportations. It also captures people leaving voluntarily, fewer new arrivals, deaths and illegal immigrants gaining legal status, all offset against anyone entering during the same period.

That distinction matters. A net population estimate is not the same thing as a government tally of deportations, and the 2.9 million figure should not be described as 2.9 million removals.

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THE FEDERAL DATA POINT IN THE SAME DIRECTION

The U.S. Census Bureau had already identified a historic collapse in net international migration. Its national estimates showed the annual figure falling from 2.7 million in 2024 to 1.3 million in 2025, with a projection of approximately 321,000 for 2026 if the trend continued.

Census analysts said the reversal was driven by both fewer immigrants entering the United States and more people leaving. They also reported that the foreign-born population in the monthly household survey fell by 1.4 million during the first half of 2025 alone.

The agency’s 2025 estimate covered July 2024 through June 2025, a period split between the Biden and Trump administrations. Census warned that policy changes take time to affect the totals and that migration is difficult to measure in real time.

To improve its estimates, the agency compared household-survey results with administrative records, repatriation data and a Mexican labor survey that tracks people who recently lived in the United States. Census said those independent indicators also showed increased emigration, including parents leaving with U.S.-born children.

The latest Bureau of Labor Statistics table provides another official snapshot. It shows the foreign-born civilian population age 16 and older dropping from 48.51 million in July 2025 to 48.109 million in July 2026, while the native-born population in that age group rose by nearly 1.9 million.

Those figures do not reproduce the entire CIS estimate because the published BLS table covers only people age 16 and older and compares July with July, rather than January 2025 with July 2026. But the direction is unmistakable.

THE SURVEY HAS LIMITS — BUT THE REVERSAL IS REAL

The Current Population Survey covers about 60,000 households and is best known as the survey behind the monthly unemployment rate. Like every survey, it carries a margin of error.

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CIS acknowledged that some apparent decline could come from immigrants becoming less willing to answer government surveys during a period of increased enforcement. The organization said it found no clear evidence of that effect, noting that nonresponse on immigration-related questions remained low and did not track the population drop.

The Census Bureau has made a similar caution: monthly survey changes can reflect nonresponse, coverage problems or updated population controls alongside people physically leaving the country.

Yet multiple federal measures now tell the same broad story. Migration has slowed dramatically, departures have increased and the foreign-born population is moving down after a historic surge.

ELECTIONS HAVE CONSEQUENCES

This is what a genuine policy break looks like.

President Trump shut down the incentives that encouraged illegal entry, restored enforcement in the interior and made it clear that violating America’s immigration laws would once again carry consequences.

The result is a border no longer operating as a one-way turnstile and an illegal-immigrant population that, by the best available estimate, is millions smaller than it was on Inauguration Day.

There is still plenty of work ahead. But after years of Washington insisting that the crisis could not be controlled, the numbers are delivering a very different verdict.

 

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