Dip in immigration is slowing metro Houston's explosive growth
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Metro Houston and Harris County are continuing to grow in population, albeit more slowly now as most counties nationwide are seeing a drop in immigration, new U.S. Census Bureau data shows.
Why it matters: International migration — Houston's growth engine — is dropping.
- The data offers the best look yet at how tighter immigration enforcement is affecting America's demographic makeup, Axios' Alex Fitzpatrick writes.
The big picture: International migration fell in 9 out of 10 U.S. counties from July 1, 2024, to June 30, 2025, compared with the prior period, per the Census Bureau.
- That drop is hitting large metros hardest because when people move from abroad, they settle in bigger cities, like Houston. These cities lose people who move to other parts of the country via domestic migration, Census Bureau demographer George Hayward said in a statement.
Zoom in: Harris County gained nearly 49,000 residents in 2025, more than any other county in the country, but that's less than half of what it added the year before.
- The Houston metro area grew by nearly 127,000 people, also the highest in the U.S., though that's roughly one-third less than its 2024 growth.
What they're saying: "What this region depends on is a healthy flow of international migration coming into Harris County, and especially the city ... and that number is really dropping off," Dan Potter, director of the Houston Population Research Center at the Kinder Institute for Urban Research, tells Axios.
- Even if fewer people arrive from abroad, movement within the region will continue — meaning suburban counties could keep growing while Houston and Harris County "either stagnate … or potentially contract in the next census release," Potter says.
State of play: Domestic migration in Harris County has been negative for roughly the past decade, with people moving to surrounding suburbs.
- Montgomery and Fort Bend counties also ranked among the fastest-growing by total population, while Waller County was the second-fastest-growing in the U.S. by percentage.
- "The metro area could end up looking relatively static on paper, while the outlying counties keep growing and the city and Harris County contract — almost like a donut," Potter says.
Threat level: As international migration slows, potential stagnation or decline in population could hit schools, infrastructure and local budgets, Potter adds.
The bottom line: Houston is still a magnet for migration — and one of the most diverse places in the country — but the forces driving its growth are shifting.