ORLANDO, Fla. — President Donald Trump’s crackdown on immigration contributed to a year-to-year drop in the nation’s growth rate as the U.S. population reached 341.8 million people in 2025, according to population estimates released Tuesday by the U.S. Census Bureau.
The 0.5% growth rate for 2025 was a sharp drop from 2024’s almost 1% growth rate, which was the highest since 2001 and was fueled by immigration. The 2024 estimates put the U.S. population at 340 million people.
Immigration increased by 1.3 million people last year, compared with 2024’s increase of 2.8 million people. The census report did not distinguish between legal and illegal immigration.
In the past 125 years, the lowest growth rate was in 2021, during the height of the coronavirus pandemic, when the U.S. population grew by just 0.16%, or 522,000 people, and immigration increased by just 376,000 people because of travel restrictions into the U.S. Before that, the lowest growth rate was just under 0.5% in 1919 at the height of the Spanish flu.
Tuesday’s data release comes as researchers have been trying to determine the effects of the second Trump administration’s immigration crackdown after the Republican president returned to the White House in January 2025. Trump made the surge of migrants at the southern border a central issue in his winning 2024 presidential campaign.
The numbers made public Tuesday reflect change from July 2024 to July 2025, covering the end of President Joe Biden’s Democratic administration and the first half of Trump’s first year back in office.
The figures capture a period that reflects the beginning of enforcement surges in Los Angeles and Portland, Oregon, but do not capture the impact on immigration after the Trump administration’s crackdowns began in Chicago; New Orleans; Memphis, Tennessee; and Minneapolis, Minnesota.
The 2025 numbers were a jarring divergence from 2024, when net international migration accounted for 84% of the nation’s 3.3 million-person increase from the year before. The jump in immigration two years ago was partly because of a new method of counting that added people who were admitted for humanitarian reasons.
“They do reflect recent trends we have seen in out-migration, where the numbers of people coming in is down and the numbers going out is up,” Eric Jensen, a senior research scientist at the Census Bureau, said last week.
Unlike the once-a-decade census, which determines how many congressional seats and Electoral College votes each state gets, as well as the distribution of $2.8 trillion in annual government funding, the population estimates are calculated from government records and internal Census Bureau data.
The release of the 2025 population estimates was delayed by the federal government shutdown last fall and comes at a challenging time for the Census Bureau and other U.S. statistical agencies. The bureau, which is the largest statistical agency in the U.S., lost about 15% of its workforce last year due to buyouts and layoffs that were part of cost-cutting efforts by the White House and its Department of Government Efficiency.
Other recent actions by the Trump administration, such as the firing of Erika McEntarfer as Bureau of Labor Statistics commissioner, have raised concerns about political meddling at U.S. statistical agencies. But Brookings demographer William Frey said the bureau’s staffers appear to have been “doing this work as usual without interference.”
“So I have no reason to doubt the numbers that come out,” Frey said.
