More than half of Guyana’s people live outside Guyana. So do more than half of Samoa’s. In Tonga, the figure reaches roughly 70%. These are not failed states in the conventional sense; they are small countries whose diasporas have simply grown larger, in relative terms, than the population that remains at home. Flip to raw numbers rather than percentages and the picture changes entirely: India, with 18.5 million citizens living abroad, tops every ranking, followed at a distance by China and Mexico. Emigration, the far less discussed twin of immigration, tells its own distinct story about push factors, economic transformation and, in the most extreme cases, conflict and collapse.
What Is an Emigrant Population?
An emigrant population, also called an origin population or diaspora, is a count of a country’s native-born or citizen population currently living outside that country’s borders. It is the mirror image of an immigrant population: the same 304 million international migrants the UN counted worldwide in 2024 appear in destination-country data as immigrants and in origin-country data as emigrants, simply viewed from the opposite end of the same movement.
Emigrant stock, like migrant stock generally, should not be confused with an annual flow of departures. A country can show a large, even growing, emigrant population without a correspondingly large number of people currently leaving each year, since the stock figure reflects the accumulated total of everyone who has ever left and not yet returned or died, spanning decades in some cases.
Countries With the Largest Emigrant Populations
By absolute numbers, a familiar and fairly stable group of large, populous countries dominates the ranking.
Largest Emigrant Populations by Country of Origin, 2024
| Rank | Country of Origin | Emigrants Abroad |
|---|---|---|
| 1 | India | 18.5 million |
| 2 | China | 11.7 million |
| 3 | Mexico | 11.6 million |
| 4 | Ukraine | 9.8 million |
| 5 | Russian Federation | 9.1 million |
| — | United Kingdom | 4.8 million |
Source: UN DESA, International Migrant Stock 2024; Migration Policy Institute.
The top five origin countries together account for roughly 20% of the world’s entire migrant population, a notably lower concentration than the roughly one-third of global migrants held by the top five destination countries. That gap is structural: migrants leaving any single large country tend to disperse across many different destinations, while migrants arriving in any single large destination country converge from many different origins, so origin-side concentration is mathematically less pronounced than destination-side concentration.
Where Do These Emigrants Go?
Emigration and immigration data are, definitionally, two views of the same underlying flows, so major origin countries connect directly to the destination rankings covered elsewhere in this series. Indian emigrants disperse widely across the Gulf states, North America, the United Kingdom and Australia. Chinese emigrants concentrate heavily in the United States, Canada, Australia and Southeast Asia. Mexican emigrants overwhelmingly settle in the United States, reflecting one of the largest and most stable single-country migration corridors in the world. Ukrainian emigration since 2022 has concentrated heavily in neighboring and nearby European countries, notably Germany and Poland, a shift the data shows arriving abruptly within a single reporting period rather than building gradually.
Why Do Some Countries Have Large Emigrant Populations?
Several distinct and sometimes overlapping mechanisms explain why a country develops a large emigrant population:
- Population size. Simply having a very large population, as with India or China, tends to produce a large absolute emigrant count even at a comparatively modest emigration rate.
- Economic transformation and the “migration hump.” Migration researchers describe a well-documented pattern in which emigration rises as a country moves from low- to middle-income status, when people first gain the financial means and motivation to move, then falls again once a country reaches high-income status and the economic incentive to emigrate weakens. This helps explain the prominence of middle-income countries such as Egypt, the Philippines and Pakistan in global emigration data.
- Conflict and political instability. Syria’s diaspora, some 8 million people out of a native-born population of around 28 million, roughly 30%, is a direct statistical legacy of its civil war. South Sudan (21%), Eritrea (18.5%) and Venezuela (16.6%) show similarly conflict- or crisis-driven diaspora shares.
- Sustained violence short of formal war. El Salvador’s diaspora share exceeds 20%, tied to gang violence that has persisted long after its civil war formally ended in 1992, illustrating that large-scale emigration does not require an active war to sustain itself for decades.
- Remoteness and small domestic economies. Pacific and Caribbean island nations, discussed below, show some of the highest emigrant shares in the world despite relative peace, driven by limited domestic economic opportunity and strong historical ties to specific destination countries.
- Historical colonial and labor-recruitment ties. The Philippines’ large global diaspora reflects decades of formal government-supported labor export programs, a distinct mechanism from the push-factor stories above.
Emigration as a Share of National Population
Switching from absolute numbers to population share surfaces an almost entirely different set of countries, dominated by small island nations and post-conflict states.
Highest Emigrant Shares of Native-Born Population
| Country | Emigrant Share of Population |
|---|---|
| Tonga | ~70% |
| Samoa | ~55-60% |
| Guyana | ~36.4% (among countries with 750,000+ population) |
| Bosnia and Herzegovina | ~34% |
| Palestine (non-sovereign territory) | ~45% |
| Syria | ~30% |
| Albania | ~30.7% |
| El Salvador | ~20.4% |
| South Sudan | ~21% |
| Eritrea | ~18.5% |
| Jamaica | ~28.6% |
| Venezuela | ~16.6% |
Sources: Statista/Visual Capitalist compilations of UN DESA data; Development Policy Centre (Devpolicy Blog), Pacific migration research.
Several small Pacific nations show an even more extreme version of this pattern: more people born in Niue, the Pitcairn Islands, the Cook Islands, Tokelau, Samoa, Tonga and the Marshall Islands currently live overseas than remain in the country itself, meaning their diaspora populations exceed their resident populations outright. With the exception of the Marshall Islands, all of these are Polynesian territories or nations with close constitutional or historical ties to New Zealand or Australia, which provide comparatively open migration pathways that most other small developing countries do not have access to.
Regionally, Polynesia recorded the highest overall diaspora share of any world region in 2020, at 28.7%, followed by the Caribbean at 17.7%, both far above the low-single-digit shares typical of large, high-income countries.
Major Global Diasporas
Beyond the raw numbers, several diaspora communities carry particular economic or cultural weight in global migration patterns:
- The Indian diaspora, the world’s largest by absolute size, spans Gulf labor migration, longer-settled communities in North America and the UK, and significant populations across Southeast Asia and Africa.
- The Chinese diaspora, concentrated heavily in North America, Australia and Southeast Asia, reflects both historical migration waves stretching back over a century and more recent economic and educational migration.
- The Filipino diaspora, built substantially on decades of formal government-supported overseas labor programs, is unusually dispersed across domestic work, healthcare, maritime and skilled labor sectors in dozens of destination countries simultaneously.
- The Syrian diaspora, at roughly 30% of its native-born population, stands as one of the largest conflict-driven diasporas in the world relative to country size, concentrated heavily in neighboring Türkiye, Lebanon and Jordan, alongside significant resettlement in Germany and other European countries.
- Pacific diasporas (Samoan, Tongan, Cook Islander and related communities), while modest in absolute global terms, are so large relative to their small home populations that they fundamentally shape the demographic trajectory of their origin countries, a dynamic explored further below.
How Emigration Patterns Have Changed
Historical emigration waves have given way to a more complex, multi-directional pattern in recent decades. Post-colonial and postwar labor migration, from South Asia to the UK, from Turkey to Germany, from Mexico to the United States, established durable corridors that continue shaping today’s diaspora distribution even as the specific drivers behind them have evolved. More recent shifts have been sharper and more visible in the data: Ukraine’s emigrant population grew 124% between 2020 and 2024 alone, the fastest rate of increase among the world’s major origin countries, a direct consequence of the 2022 invasion. Venezuela (+52.1%) and Afghanistan (+31.4%) posted the next-fastest growth rates over the same period, both tied closely to political and economic crisis rather than the slower-moving economic drivers, such as the migration hump, that explain the more gradual growth of diasporas from countries like the Philippines or Pakistan.
The Economic Role of Emigrant Populations
Emigrant populations generate substantial economic effects for their countries of origin, most visibly through remittances. Officially recorded global remittances were projected to reach nearly $905 billion in 2024, with India, Mexico, China, the Philippines and Pakistan together receiving close to half of all remittance flows directed to low- and middle-income countries. For many smaller or lower-income origin countries, remittances represent a larger and often more stable source of foreign income than foreign direct investment, and in the most diaspora-heavy Pacific nations, remittance income can constitute a substantial share of total national income, a relationship researchers have described as central to how these small economies sustain themselves despite limited domestic production.
Beyond direct financial transfers, large diasporas also function as ongoing labor-market and demographic pressure valves for their origin countries, a dynamic especially visible in the Pacific, where the growth of national diaspora populations and the growth of domestic resident populations move in an inverse relationship: countries with the highest rates of emigration, such as Tonga and Samoa, have shown correspondingly slower domestic population growth than Pacific nations with fewer migration opportunities, such as Solomon Islands or Papua New Guinea.
Key Findings
- India is the world’s largest single source of emigrants, with about 18.5 million citizens living abroad, ahead of China (11.7 million) and Mexico (11.6 million).
- The top five origin countries account for only about 20% of the global migrant population, a much lower concentration than the roughly one-third held by the top five destination countries, because emigrants from any single country disperse across many destinations.
- Tonga and Samoa have the highest emigrant shares of any sovereign nation, at roughly 70% and 55-60% of their native-born population respectively.
- At least seven small Pacific territories and nations, including Niue, the Cook Islands, Tokelau, Samoa, Tonga and the Marshall Islands, now have more people living abroad than remain in the country itself.
- Ukraine’s emigrant population grew 124% between 2020 and 2024, the fastest rate of increase among the world’s major origin countries, a direct statistical consequence of the 2022 invasion.
- Global remittances reached a projected $905 billion in 2024, with India, Mexico, China, the Philippines and Pakistan together receiving nearly half of all flows to low- and middle-income countries.
- Conflict and crisis-driven diasporas, including Syria (~30%), South Sudan (~21%) and Eritrea (~18.5%), rank among the highest emigrant shares in the world, alongside economically driven cases like El Salvador (~20.4%).
Frequently Asked Questions
1. Which country has the most emigrants?
India has the largest emigrant population of any country in absolute terms, about 18.5 million citizens living abroad as of 2024, ahead of China and Mexico.
2. Where do most migrants come from?
The largest single sources are India, China and Mexico, though collectively the top five origin countries account for only about a fifth of the world’s migrant population, reflecting how widely dispersed global emigration is compared with the more concentrated pattern of destination countries.
3. What country has the largest diaspora relative to its size?
Tonga has the highest emigrant share of any sovereign nation, with roughly 70% of people born there now living abroad, followed closely by Samoa at around 55-60%.
4. What is the difference between an emigrant and an immigrant?
An emigrant is a person counted from the perspective of the country they left; an immigrant is the same person counted from the perspective of the country they moved into. Both terms describe the same underlying group of international migrants.
5. Why do some small countries have such large diasporas?
Limited domestic economic opportunity, small national economies, and, in several Pacific cases, close historical and constitutional ties to larger destination countries like New Zealand and Australia that provide comparatively open migration pathways.
6. Which countries have diasporas driven mainly by conflict?
Syria (~30% of its native-born population), South Sudan (~21%), Eritrea (~18.5%) and Venezuela (~16.6%) all show diaspora shares driven substantially by war, political instability or state collapse rather than voluntary economic migration.
7. How much money do emigrants send home?
Global remittances reached a projected $905 billion in 2024, with India, Mexico, China, the Philippines and Pakistan together receiving close to half of all flows to low- and middle-income countries.
8. Has emigration from any country grown especially fast recently?
Yes. Ukraine’s emigrant population grew 124% between 2020 and 2024, by far the fastest rate among major origin countries, followed by Venezuela (+52.1%) and Afghanistan (+31.4%), all tied to conflict or political crisis.
9. Do large emigrant populations mean a country is losing people rapidly right now?
Not necessarily. Emigrant stock reflects the accumulated total of everyone who has left and not returned, which can build up gradually over decades even without a large number of people currently departing each year.
10. What is the “migration hump”?
It is a pattern documented in migration research in which emigration rises as a country moves from low- to middle-income status, since people first gain the financial means and motivation to leave, then falls again once the country reaches high-income status and the economic incentive to emigrate weakens, helping explain the prominence of middle-income countries in global emigration data.
Sources
- United Nations Department of Economic and Social Affairs (UN DESA), Population Division, International Migrant Stock 2024: Key facts and figures, 2025
- Migration Policy Institute, “Top Statistics on Global Migration and Migrants,” 2025
- Visual Capitalist, “Mapped: Countries with the Largest Emigrant Populations,” January 2026, citing UN DESA data
- Visual Capitalist / Forbes, “The World’s Biggest Diasporas,” citing UN figures
- Statista, “The countries with the most people living overseas,” citing UN DESA
- Development Policy Centre (Devpolicy Blog), “In the Pacific, migration and population growth are inversely related,” 2020
- freerangestats.info, “Pacific diaspora,” 2026, using UN DESA migrant stock data
- World Bank, remittance flow projections, 2024
