The Immigration Slowdown Is Rewriting U.S. Population Growth
- Loan Genie Insights
- Mar 30
- 8 min read
The Bottom Line
Population growth slowed in 2025, from 0.8% annual growth from 2020-2024, to 0.3% in 2025.
The biggest driver: a drop in international immigration flows, from 2.7m in 2024 to 1.3m in 2025
Coastal megacities are losing momentum
Mid-size metros in the Midwest and South are proving far more resilient
The next housing winners are not the biggest cities — but the most balanced ones
The U.S. Census Bureau's Vintage 2025 population estimates — released last week — paint a striking picture of a country whose demographic momentum has changed course. After a brief post-pandemic surge driven by record immigration, American cities are now grappling with a sharp slowdown. This analysis draws on data from the top 100 metropolitan statistical areas (MSAs) to unpack what happened, where, and why.
The Post-COVID Slowdown: A Nation Hitting the Brakes
From 2020 to 2024, American metros grew at an average annualized rate of 0.80% per year — respectable, if uneven. But in the single year from 2024 to 2025, that pace collapsed to just 0.30%. This isn't a gentle deceleration. It's a cliff.
The primary culprit is immigration. Net international migration (NIM) — the net flow of people moving between the U.S. and other countries — peaked at 2.7 million in 2024, its highest level since at least 2001. It then fell to 1.3 million in 2025 — a 54% drop in a single year. The Census Bureau projects further decline to approximately 321,000 by mid-2026 if current trends continue.
Natural change (births minus deaths) remained broadly stable, contributing around 519,000 nationally. It played no role in the slowdown. The story is almost entirely about migration.
Immigration vs. Domestic Migration: Unpacking the Drivers
Immigration hits the coastal cities the hardest. We decompose the population growth in coastal metros into three components: net international migration (NIM), net domestic migration (NDM), and natural change (births minus deaths).
The immigration engine stalled
Net international migration peaked nationally at 2.7 million in 2024, accounting for 84% of the nation's total population growth that year. In 2025, it fell to 1.3 million — a 54% drop. The decline was caused by both fewer arrivals and a significant increase in emigration (people leaving the U.S.), particularly from Latin American countries.
The impact was not evenly distributed. California's NIM fell from 313,000 to 109,000 — a 65% drop, the steepest of any state. Los Angeles County alone lost 62,934 in NIM — the largest county-level NIM decline in the nation. New York state fell 53%, Massachusetts 49%, Illinois 63%.
For the biggest coastal metros, these numbers translate directly into population losses. New York's estimated NIM fell from ~213,000 to ~99,000. Combined with a chronic domestic outflow of ~206,000 per year, even its natural increase of ~45,000 couldn't prevent the metro losing 62,110 people overall.
Domestic migration: the bleeding is slowing
Here's the part of the story that's easy to miss: domestic out-migration from major coastal metros has actually been improving. New York's domestic outflow narrowed by approximately 34,000 year-over-year. Los Angeles improved by ~21,000, Chicago and Washington DC each by ~20,000. San Francisco, long a cautionary tale, is seeing its domestic losses moderate.
This improvement reflects several trends: the normalization of hybrid work (people no longer need to flee high-cost cities to work remotely), rising affordability pressures in Sun Belt destinations, and the stabilization of housing markets in coastal metros. Americans are leaving the big coastal cities at a slower rate than at the COVID peak.
The problem is that this positive domestic trend is being swamped by the immigration collapse. The domestic improvement is measured in tens of thousands. The NIM loss for each of these metros is measured in six figures.
Coastal MSA component breakdown
The table below shows the estimated component breakdown for selected coastal MSAs in 2024–25. NIM estimates are derived by applying state-level Census Vintage 2025 NIM decline ratios to each MSA's 2024 NIM. Domestic migration is a residual.
MSA | Total Δ | Net intl. migration | Net dom. migration | Natural change |
New York, NY | −62,110 | +99,000 | −206,000 | +45,000 |
Los Angeles, CA | −27,110 | +19,000 | −74,000 | +28,000 |
Chicago, IL | −22,340 | +27,000 | −61,000 | +12,000 |
San Francisco, CA | −6,780 | +10,000 | −23,000 | +6,000 |
Washington, DC | +10,000 | +30,000 | −38,000 | +18,000 |
Seattle, WA | +17,780 | +20,000 | −15,000 | +12,000 |
Boston, MA | +18,000 | +21,000 | −13,000 | +10,000 |
Table 1: Estimated population components, selected coastal MSAs, 2024–25. NIM derived from Census Vintage 2025 state-level decline ratios. NDM is a residual. Natural change estimated from 2024 data.
The structural trap for large coastal metros
The data reveals a structural condition, not just a cyclical blip. Large coastal metros rely on immigration to offset chronic domestic out-migration. They always have. The unusual period of 2022–2024 saw NIM surge to historically unprecedented levels, making these metros look healthy. Now that NIM has returned to earth — and is projected to fall further — the underlying domestic losses are being fully exposed.
Unless domestic out-migration reverses substantially, or immigration recovers, metros like New York, Los Angeles, Chicago, and San Francisco face sustained population stagnation or modest decline for the foreseeable future. Natural change — births minus deaths — is too small and too demographically constrained to compensate.
Regional Divergence: The South Still Leads, But Lost the Most
The four Census regions tell very different stories about where American population growth is concentrating — and where it is evaporating.
+0.60% South 2024–25 growth rate | +0.44% West 2024–25 growth rate | +0.27% Midwest 2024–25 growth rate | ≈0.00% Northeast 2024–25 growth rate |
The South: still king, but slowing fast
The South remains by far the fastest-growing region, averaging +0.60% in 2024–25 across its 41 MSAs in our dataset — nearly double the West and more than double the Midwest. Only 2 of 41 Southern MSAs are now shrinking (New Orleans and Jackson, MS). South Carolina, North Carolina, Tennessee, and Texas metros continue to attract the largest domestic migration inflows of any state groupings.
But the South also saw the largest absolute deceleration: down 0.73 percentage points from its 2020–25 annualized pace. This makes sense — it was growing fastest, so it had the most to lose when immigration contracted and domestic mobility cooled.
The Northeast: flat and fragile
The Northeast's average growth rate in 2024–25 rounds to essentially zero. With 9 of 16 Northeastern MSAs in our dataset now losing population, it is by far the most vulnerable region. NIM was the primary or sole growth driver for virtually every Northeast metro, and when it fell sharply — New York state lost 53% of its international migration, Connecticut and Massachusetts about 44–49% — these cities had nothing left to fall back on. Domestic outmigration continues, natural change is negative in most of these metros, and NIM is no longer sufficient to offset both.
The Midwest: a quiet comeback story
The Midwest is the surprising bright spot, not because it's growing fast, but because it's stabilizing. It was the only region in 2024–25 where all states gained population, and it saw positive net domestic migration for the first time this decade. Columbus (OH), Indianapolis (IN), Kansas City (MO), and Des Moines (IA) are all growing solidly. The region's metros were never as dependent on immigration as coastal metros, so the NIM collapse hit them less hard.
Region | MSAs growing | MSAs shrinking | Avg growth 2020–25 | Avg growth 2024–25 | Decel (pp) |
South | 39 / 41 | 2 / 41 | +1.33% | +0.60% | −0.73 |
West | 20 / 25 | 5 / 25 | +0.90% | +0.44% | −0.46 |
Midwest | 10 / 18 | 8 / 18 | +0.62% | +0.27% | −0.35 |
Northeast | 7 / 16 | 9 / 16 | +0.11% | ≈0.00% | −0.11 |
Table 2: Regional summary. Author analysis of U.S. Census Bureau Vintage 2025 data (100 MSA dataset).
Size Matters: Small MSAs Lead, Large Metros Lag
When broken down by population size, a clear and consistent hierarchy emerges: smaller metro areas outgrow larger ones, and have done so across both the full 2020–25 period and the single year of 2024–25.
+0.47% Small MSAs (<1M) 2024–25 avg growth | +0.37% Medium MSAs (1–3M) 2024–25 avg growth | +0.33% Large MSAs (>3M) 2024–25 avg growth |
Large metros (those with over 3 million residents) are caught in a structural trap. They tend to be both international migration hubs and domestic out-migration losers. When NIM was surging from 2021–2024, international arrivals more than offset domestic losses for cities like New York, LA, Chicago, and San Francisco. Now that NIM has collapsed, the domestic outflow — which never stopped — is no longer compensated.
Small metros, by contrast, have more balanced growth engines. Many are in the South or Mountain West, where domestic in-migration is strong and they never depended as heavily on international flows. Provo-Orem (UT) leads all 100 MSAs in 2024–25 growth at +1.18%. Cape Coral, Jacksonville, Spokane, Chattanooga, Durham, and Charleston (SC) all exceeded +0.88%.
The domestic migration tide favors smaller counties
A striking finding from the county-level data: the 50 counties with over 1 million residents collectively lost 637,634 people to domestic out-migration in 2024–25. In contrast, mid-size counties (50,000–999,999 people) gained 533,766 through domestic in-migration, and smaller counties also saw net gains. Population is redistributing from the very largest urban cores to mid-size cities, suburbs, and smaller metros across the South and Mountain West.
Key Takeaways and What to Watch
1. This is a structural shift, not a blip
The Census projects NIM to fall to approximately 321,000 by mid-2026 — down from 2.7 million just two years earlier. Even if immigration partially recovers, the 2022–2024 surge was anomalous. Large coastal metros cannot plan around a return to those levels.
2. Small-to-mid-size Sun Belt metros are the winners
Provo-Orem, Cape Coral, Charleston, Raleigh, Durham, Chattanooga, Spokane, Columbus, and Indianapolis are all growing at 0.8–1.2% annually — faster than any large metro and with more balanced growth engines. They attract domestic movers, have younger populations supporting natural increase, and are less exposed to NIM volatility.
3. The Midwest's stabilization is real
Ohio, Indiana, and Missouri metros are quietly normalizing after years of decline. Columbus grew 0.87% in 2024–25, Indianapolis 0.80%, Kansas City 0.73%. The Midwest saw positive domestic migration for the first time this decade — a genuine inflection point, even if the magnitudes are modest.
4. The domestic trend is healing, but too slowly
Domestic out-migration from large coastal metros is declining year-over-year. This is a meaningful positive signal. The question is whether this trend can accelerate fast enough to compensate for a sustained reduction in international migration. Based on current trajectories, the answer for 2025–2026 is no.
5. Natural change is a failing backstop
In 2017, natural change contributed 1.1 million people nationally. In 2025, it contributed ~519,000. Births are declining, aging demographics are increasing deaths, and there is no sign of reversal. Natural change cannot be relied on as a substitute for either immigration or domestic in-migration. This is especially true for Northeastern metros, where natural decrease (more deaths than births) is already the norm in most counties.
Data & Methodology
This analysis is based on the U.S. Census Bureau's Vintage 2025 Population Estimates, released January 27 and March 26, 2026. MSA-level component data (NIM, domestic migration, natural change) has not yet been published by the Census at the MSA level for 2025; where used, NIM estimates are derived by applying state-level NIM decline ratios from the published Vintage 2025 state release to each MSA's Vintage 2024 NIM. Domestic migration is a derived residual. The dataset covers 100 MSAs from the uploaded Census demographics file. All growth rates are calculated from the Census-published population figures.
U.S. Census Bureau sources: Vintage 2025 National & State Population Estimates (Jan 2026); County Population Totals and Components of Change 2020–2025 (Mar 2026); Metropolitan Statistical Area Population Estimates 2020–2025 (Mar 2026); "Net International Migration Down in Every State and Most Counties" (Mar 2026); "Slow Growth Impacts Nation's Largest Counties Hardest" (Mar 2026).
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