The American Diaspora - An Uncounted Population

How many Americans
live abroad?
No one knows.

Since the November 2024 US election, emigration inquiries have reached the highest sustained levels operators in the field have recorded. The underlying question is older. How many US citizens currently live outside the United States, and where are they? No federal agency is in a position to say.

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Travellers moving through an airport terminal concourse
The Federal Data Gap

The United States does not count its citizens abroad.

The most-cited figure, nine million, is not a counted number. The 2024 Federal Voting Assistance Program estimate places it at 3.3 million; other respected estimates run to five million; the Congressional Research Service has declined to commit. The structural reason: the United States does not maintain a federal civil register on the European model, address is captured at the driver’s license rather than at the federal level, and the Census Bureau decided in 1976 to exclude private Americans abroad from the decennial enumeration (overseas federal employees and military are still counted). What remains are voluntary touchpoints (tax filings, passport renewals, absentee ballot requests), each measuring a partial subset, none aggregating to a count.

The American Emigration Revue

AER was founded to remediate the absence.

The American Emigration Revue is a research publication on US citizens living abroad. It curates the news, the policy developments, the academic literature, and the primary data on a population the federal apparatus declines to enumerate. The editorial premise is simple: if the American state will not count its emigrants, the only available alternative is to ask the receiving states.

The anchor of the research

Everything we publish sits on one dataset. This is it.

All 99 countries researched by 26 country specialists reading their own statistical systems in their own languages — assembled into a single dashboard where the figures can be compared, sourced and exported. The articles, the index and the briefs all draw on it. It is open: no account, no paywall.

US-born residents · 64 countries reporting
2,373,975
Aggregated from national statistics
Largest US-born population
797,266
Mexico
New US residents · EU-27
91,615
27 countries · Eurostat
Americans becoming citizens abroad
28,772
47 countries reporting
The AER dashboard global view: every country shaded by its US-citizen arrivals, with tabs for US-born, US citizens, inflows, naturalizations and long-term permits
Global view

Every country, on one metric, at once.

Switch between US-born stock, US-citizen stock, arrivals, naturalizations and long-term permits. Countries that publish nothing are drawn as gaps rather than guessed at.

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The AER transparency index: every country scored zero to five on how much its statistical apparatus publishes about Americans living there
Data transparency

Who publishes, and who does not.

Each country scored across five domains on how completely its public statistics expose data on Americans living there. A low score does not mean few Americans — it means the record cannot tell you.

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The AER dashboard subnational view for Brazil: American residents broken down by federal unit
Inside a country

Down to where they actually settle.

Where a government publishes it, the dashboard goes below the national figure — settlement by state or federal unit, age and sex structure, visa-category trends — with the source on every number.

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Counted, not modeled. Every figure is one a government published, and carries the authority, the dataset and the year it came from.The method
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The video

Two minutes inside the dashboard.

Where the figures come from, what each government will and will not release, and how a hole in the public record gets reported as a finding rather than filled with a guess.

Data transparency

A measurement of who publishes, and who does not.

Adjudicated, open to challenge, citable under CC BY 4.0. The clearest published records are below; the full ranked list runs across every country in the dataset, domain by domain.

See all 99 ranked
Clearest published record
01🇩🇰Denmark5.0 / 5
01🇸🇪Sweden5.0 / 5
03🇦🇹Austria4.5 / 5
03🇧🇪Belgium4.5 / 5
03🇨🇿Czechia4.5 / 5
Research articles

What the record shows once you read it across borders.

Flags of Caribbean countries Saint Kitts and Nevis, Dominica, Saint Lucia, Grenada, Antigua and Barbuda
Research

Americans Buy Caribbean Citizenship by Investment and Vanish From the Data

Five CARICOM states operate citizenship-by-investment programs whose grants include free movement across the region. U.S. nationals are plausibly the largest single applicant group, yet they appear in neither set of records: not in destination-country resident tallies, not in U.S. emigration data.

Entrance to the Berlaymont building, headquarters of the European Commission, Brussels, Belgium
Research

US Emigration to Europe Split 4 Ways in the Eurostat Decade

Eurostat is the only destination-country statistical system that publishes harmonized, country-disaggregated migration data on U.S. nationals. The decade ending in 2025 reveals four overlapping American stories in Europe that pull in different directions.

Maps of countries in Middle East
Research

Gulf States Count Their Americans but Won't Publish the Number

Gulf Cooperation Council states track foreign nationals by nationality for visa management and security purposes but publish almost none of the resulting data. The U.S. resident population across the GCC, plausibly between 50,000 and 80,000 people, represents the clearest example of administrative capacity that does not translate into public disclosure.

Full moon rising behind the illuminated Almudena Cathedral at twilight in Madrid, Spain. A stunning urban skyline with warm evening light and deep blue sky, a primary reason why Americans moving to Spain has become a thing.
Research

Americans Moving to Spain Target Madrid, Barcelona and Valencia

Americans moving to Spain have made it one of the top destinations for U.S. expatriates, with Madrid, Barcelona, and Valencia drawing the biggest share of new arrivals. More than 50,000 U.S. expats are currently living in Spain, a figure that has only continued to rise. In fact, in the last two years, the number of […]

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