Definitions

The Words Behind the Numbers

Counting Americans abroad means borrowing each country's own administrative vocabulary. This page defines the five core metrics used across the dashboard, then the country-specific terms, programs, and agencies that appear on individual country pages.

The Five Core Metrics

No single number says how many Americans live in another country; each of these counts a different thing, and the dashboard always says which one you are reading, and for which year.

US-bornPeople born in the United States, whatever passport they hold now; censuses count birthplace.

US citizensUS passport holders registered as residents: population registers count nationality. A different count from US-born.

InflowsUS citizens who moved in during the latest published year: new arrivals, not the resident total.

NaturalizationsAmericans who became citizens of that country in a year: the strongest signal of permanent settlement.

Long-term permitsUS nationals holding long-term residence or work permits: how settled the resident population is.

Visitor flowsShort visits counted at the border: tourism and business trips. Reported separately and never read as migration or residence.

Glossary

Programs, registers, visa categories, and agencies referenced on the country pages: each scoped to the countries where it applies.

ACR I-Card (Philippines): Alien Certificate of Registration Identity Card; required for foreign nationals staying more than 59 days.
ADNKS (Türkiye): Adrese Dayalı Nüfus Kayıt Sistemi, the Address-Based Population Registration System operated by TÜİK; the closest Turkish equivalent to a residence-permit stock figure.
Aliyah / oleh / olah (Israel): immigration under the 1950 Law of Return; oleh (m.) / olah (f.) is the immigrant under that framework. Confers Israeli citizenship on arrival.
Balikbayan: A member of the Filipino diaspora — a former Filipino citizen, or the spouse or child of one travelling with them — returning to the Philippines. Entitled to visa-free entry for one year under the Balikbayan Program (Republic Act 6768, as amended by RA 9174). Many American Balikbayan are US citizens of Filipino descent.
BPS (Indonesia): Badan Pusat Statistik, the Indonesian Central Statistics Agency.
CARICOM (Caribbean): Caribbean Community established under the 1973 Treaty of Chaguaramas (revised 2001); confers status of regional national on citizens of member states.
CBI / RCBI: Citizenship-by-Investment and Residency-by-Investment programmes. CBI grants citizenship by qualifying economic contribution (Eastern Caribbean cluster — Antigua & Barbuda, Dominica, Grenada, Saint Kitts & Nevis, Saint Lucia — and Vanuatu); RCBI grants residence rather than citizenship.
CBS (Israel): Central Bureau of Statistics; publishes the aliyah country-of-last-residence series and the Statistical Abstract foreign-born aggregates.
Citizenship by option (Argentina): descent-based acquisition of Argentine citizenship via documentary route at RENAPER.
Cittadinanza per discendenza (Italy): descent-based acquisition of Italian citizenship under Law 91/1992, with no generational limit on the eligibility chain.
Country of last residence vs. country of citizenship (Eurostat / national statistics): two distinct bases on which migration flows can be tabulated; not directly comparable.
CSME (Caribbean): CARICOM Single Market and Economy; the regional integration framework under which CBI-acquired citizenship carries free-movement rights across participating member states.
D7 visa (Portugal): Visto de Residência D7, the principal Portuguese passive-income lifestyle-residency pathway since 2012.
DMDC (United States): Defense Manpower Data Center, publisher of quarterly Active Duty Military Personnel by Country reports.
DOSM (Malaysia): Jabatan Perangkaan Malaysia, the Department of Statistics Malaysia.
eCRBA (United States): Electronic Consular Report of Birth Abroad; the State Department’s record of U.S. citizenship acquired by birth abroad to U.S.-citizen parents.
EUCOM (United States — Europe): U.S. European Command; the geographic combatant command responsible for U.S. military operations in Europe, including the SOFA-resident force in Germany.
F-4 visa (Republic of Korea): Overseas Korean visa; long-term residence pathway open to ethnic Koreans abroad, including U.S. citizens of Korean descent.
FACO (United States): Federally Affiliated Count Overseas; the decennial Census Bureau count of U.S. military and civilian federal personnel and their dependants stationed overseas.
FATCA / Form 8938 (United States): Foreign Account Tax Compliance Act and the Statement of Specified Foreign Financial Assets it requires; adjacent to FBAR but with different thresholds and scope.
FBAR / FinCEN Form 114 (United States): annual filing required of U.S. persons holding foreign financial accounts aggregating over USD 10,000.
First residence permit (Eurostat): a residence permit issued to a person for the first time, or after a gap of at least six months from a previous permit.
Folkeregister (Nordic): civil population register operated by Nordic states; the institutional anchor for the Nordic A-range Data Visibility Index scores.
Foreign Earned Income Exclusion / Form 2555 (United States): IRS form filed by U.S. citizens and resident aliens working abroad to claim the foreign-earned-income exclusion; the strongest tax-side proxy for the working-age expatriate population.
Form 6039G / Section 6039G expatriation notices (United States): quarterly Federal Register publication of individuals who have chosen to expatriate under IRC §§ 877(a), 877A, or 877(e)(2).
Friendly Nations Visa (Panama): Visa de Países Amigos; the dominant lifestyle-residency pathway for U.S. nationals in Panama since 2012.
FVAP OCPA (United States): Federal Voting Assistance Program Overseas Citizen Population Analysis, the biennial model-averaging estimate of U.S. citizens abroad; OCPA 2024 places the figure at 3.3 million total / 2.2 million voting-age.
Golden Visa (Portugal — abolished 2024 for residential property): Visto Gold, the investment-residency programme that operated alongside the D7 visa until its phased restructuring.
IIE / Open Doors (United States): Institute of International Education’s annual Open Doors Report on International Educational Exchange, sponsored by the State Department.
INEGI (Mexico): Instituto Nacional de Estadística y Geografía; publishes the decennial Census from which the 797,266 U.S.-born resident figure is drawn.
INM (Mexico): Instituto Nacional de Migración; the residence-permit administration.
IRS SOI (United States): Internal Revenue Service Statistics of Income division; publishes five-yearly Form 2555 and Form 1116 aggregates.
Jus sanguinis: the legal principle that citizenship is acquired through descent (right of blood). Underwrites the Italian, Mexican, Israeli, Argentine, and Korean descent-citizenship pathways examined in the research.
Jus soli: the legal principle that citizenship is acquired through place of birth (right of soil). The dominant U.S. constitutional principle under the Fourteenth Amendment.
LMRA (Bahrain): Labour Market Regulatory Authority; publishes quarterly Expatriate Management System statistics that exclude the NAVCENT-resident U.S. cohort.
Long-term residence permit (Eurostat): status under Council Directive 2003/109/EC, requiring at least five years of legal residence.
LTR (Thailand): Long-Term Resident programme administered by the Board of Investment since 2022; the most recent of the major Asian lifestyle-residency pathways.
NAVCENT (United States — Bahrain): U.S. Naval Forces Central Command and the Fifth Fleet headquarters in Manama; approximately 9,000 personnel and dependants, structurally absent from Bahraini administrative datasets.
OCI (Overseas Citizenship of India): A lifelong visa and residence-rights status India grants to people of Indian origin and their spouses. It is not full citizenship — holders cannot vote or hold public office — but it functions as the largest quasi-citizenship instrument held by people in the United States for any country in this research.
OECS (Caribbean): Organisation of Eastern Caribbean States; the regional intergovernmental body that the five CBI jurisdictions belong to alongside CARICOM.
Pensionado (several Latin American programmes): retirement-residency category. The Costa Rican Pensionado requires USD 1,000/month verified pension; Panama’s USD 1,000/month; Nicaragua’s USD 600/month; with similar pathways in Belize, Mexico, and elsewhere.
QRP (Belize): Qualified Retired Persons programme; lifestyle-residency framework targeted at foreign retirees.
RENAPER (Argentina): Registro Nacional de las Personas; identity register and source for Argentine citizenship-by-option grants.
Rentista (several Latin American programmes): investment-income lifestyle-residency category, parallel to Pensionado but for non-pension passive income. Costa Rican Rentista requires USD 2,500/month verified investment income; Nicaraguan USD 750/month.
SOFA: Status of Forces Agreement; bilateral treaty governing the legal position of U.S. military personnel deployed on foreign soil. Major SOFAs in scope include the U.S.–Japan, U.S.–Korea, U.S.–Germany, and U.S.–Italy frameworks.
SRRV (Philippines): Special Resident Retiree’s Visa, administered by the Philippine Retirement Authority (PRA).
SRRV (Special Resident Retiree's Visa): The Philippines' indefinite-stay retirement visa, administered by the Philippine Retirement Authority under Executive Order 1037. Extendable to a spouse and dependents; the principal/spouse/dependent split is how PRA reports enrollment.
SSA Table 5.J11 (United States): Social Security Administration Annual Statistical Supplement table reporting OASDI beneficiaries by foreign address; December 2024 figure: 711,778.
STEP (United States): Smart Traveler Enrollment Program; voluntary State Department travel/residence registry. Aggregate enrolment data is not published.
TÜİK (Türkiye): Türkiye İstatistik Kurumu, the Turkish Statistical Institute; operates ADNKS and publishes the foreign-born resident series.
UN M49: United Nations Standard Country or Area Codes for Statistical Use; the geoscheme on which the project’s regional taxonomy is based (with two consequential variations noted in the Introduction).
UPMRIP (Mexico): Unidad de Política Migratoria, Registro e Identidad de Personas, the unit of SEGOB that publishes the annual Boletín Estadístico on migratory movements.
USFJ (United States — Japan): U.S. Forces Japan; the SOFA-resident U.S. military force in Japan, approximately 55,000 personnel before dependants.
USFK (United States — Korea): U.S. Forces Korea; the SOFA-resident U.S. military force in the Republic of Korea, approximately 28,500 personnel before dependants.

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