Current Status + Progress

In 2015, there were 244 million people worldwide living outside their country of birth; 31 million of them were children. Among the world’s migrants are more than 21 million refugees – some 10 million of whom are children – who have been forcibly displaced from their own countries. An additional 41 million people in 2015 were internally displaced due to conflict and violence, and estimated 17 million of those were children.


Since 1990, the proportion of international child migrants as part of the world’s child population has remained remarkably stable at just over 1 per cent, but a rising global population means that the absolute number of child migrants has increased in the past 25 years. The same is true for the overall international migrant population, which has remained around 3 per cent of the total population. In 2015, there were 244 million international migrants, compared to 153 million just 25 years before.

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Origin and destination of international migrants

In 2015, 1 in every 70 children worldwide lived outside the country of his or her birth. Like adults, most children who move migrate primarily within their own regions. Globally, more than half of international migrants have moved to another country within the same region where they were born.

Approximately one quarter of all the world’s migrants were born in Asia and live in a different country within Asia; another 17 per cent of international migrants are Europeans who have moved within Europe. Owing in large part to its substantial share of the total population, Asia is also the region of origin for the highest number of migrants who leave their region of birth. In 2015, there were 40 million international migrants born in Asia but living outside of Asia.

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Children, as part of larger population movements, generally end up in higher income countries after they migrate. Roughly 8 in 10 migrants globally move to a country with a gross national income at least 20 per cent higher compared to their country of birth. While 72 per cent of the world’s migrants live in high-income countries, the origins of those migrants are mixed. As shown in Figure 1.9, migrants in high income countries come in roughly equal measure from high-, middle-, and lower-middle income countries. Only 3 out of every 100 migrants in high-income countries was born in a low-income country.

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Where the world’s child migrants live

Nearly 12 million of the world’s international child migrants live in Asia. This represents almost 40 per cent of all migrant children, though it is actually much lower than Asia’s proportion of the global child population (56 per cent of all children). Africa’s proportion of child migrants most closely matches its share of the global child population (21 and 25 per cent, respectively). Together, Africa and Asia host three out of every five child migrants.

Half of all the world’s child migrants live in just 15 countries, led by the United States of America, which is home to 3.7 million child migrants. The countries with the highest numbers of child migrants generally share one of two characteristics. Some, including Lebanon, Jordan and Mexico, have high proportions of children in their overall migrant population (43, 46, and 62 per cent respectively.) In other countries, including Saudi Arabia, the United Arab Emirates, Canada and the United States of America, children are a relatively small percentage of the migrant population but those countries’ overall migrant populations are so large that the total number of migrant children is still quite high.

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Internal Migration

While international migration receives substantial attention in the research and policy dialogue, it is only a small portion of overall population movements. A much higher percentage of the world’s population movements takes place within borders rather than across them. According to the most recent global estimates, by 2005, upwards of 760 million people had migrated within their own countries since birth, nearly four times as many people as had migrated internationally.

Comparable, comprehensive global estimates on internal migration are extremely limited, making it difficult to assess the scale, trends, and impacts of internal migration on children at a global level. This leaves researchers and policymakers to rely on piecemeal studies and data sets and represents a major gap in global migration data. Looking at the available information from the world’s two most populous countries, however, the scale and policy implications of internal migration for children are clear.

In China, there were an estimated 245 million internal migrants in 2013. This followed an explosive growth in internal migration since the turn of the century – in 1982, there were only 6.6 million internal migrants in the country.    This surge in migration, combined with the design of China’s household registration system (hukou), has complicated the migration of parents together with their children. In part because hukou can make it difficult to enroll children in urban schools or take advantage of the public health care system after migrating, many internal migrants leave their children behind when they move.

In 2010, almost 70 million children in China stayed behind when their parents migrated. Another 36 million children moved with their parents. Together, these 100 million children mean that two out of every five children in China were directly affected by migration. Because of the rural-to-urban nature of most internal migration in China, nearly 90 per cent of children who were left in the care of others when their parents migrated were in rural areas, meaning that four in ten children in rural areas were living without one or both parents because of migration.

An estimated 326 million people – more than a quarter of the national population – had moved across India by 2007-2008.  That same year, 15 million children in India were estimated to be living as internal migrants within the country. That number is equivalent to roughly half the number of international child migrants in the world, underscoring just how vital continued analysis of and dialogue about internal migration is for the well-being of children.

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Recent Resources

Children on the move: key facts and figures

Feb 26, 2018

Millions of children have migrated across borders or been forcibly displaced. As of 2016, 28 million children were living in forced displacement – this includes 12 million child refugees and child asylum seekers, and 16 million children living in internal displacement due to conflict and violence. These numbers do not include 7 million children internally displaced by natural disasters. Millions of other children had moved, within or across borders, in pursuit of better opportunities. This Data Brief presents key facts and figures about children in migration and displacement and the numbers behind UNICEF’s 6 Agenda for Children on the Move.

Call to Action: Protecting children on the move starts with better data

Feb 14, 2018

Millions of children have migrated across borders or been forcibly displaced and reliable, timely and accessible data and evidence are essential for understanding how migration and forcible displacement affect children and their families – and for putting in place policies and programs to meet their needs. However, we do not know enough about children on the move: their age and sex; where they come from, where they are going, whether they move with their families or alone, how they fare along the way, what their vulnerabilities are. In many cases data are not regularly collected, and quality is often poor. This joint A call to action – Protecting children on the move starts with better data by UNICEF, UNHCR, IOM, Eurostat and OECD urges Member States to prioritize actions to address these evidence gaps, and include child-specific considerations in the Global Compact for Safe, Orderly and Regular Migration and the Global Compact on Refugees.

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Harrowing Journeys

Sep 11, 2017

Young migrants and refugees set out to escape harm or secure better futures – and face staggering risks in the process. For children and youth on the move via the Mediterranean Sea routes to Europe, the journey is marked by high levels of abuse, trafficking and exploitation. Some are more vulnerable than others: those travelling alone, those with low levels of education and those undertaking longer journeys. These and more findings come from a new UNICEF and IOM analysis of the journeys of some 11,000 young refugees and migrants between 14 and 24 years old along the Eastern and Central Mediterranean routes to Europe.

Download full report in English (PDF 6.0 mb) | Download UNICEF’s Agenda for Action | Download Executive Summary (ARENESFR) | Download Press Release

A child is a child – Protecting children on the move from violence, abuse and exploitation

May 18, 2017

Among the millions of children on the move worldwide, many – including hundreds of thousands of unaccompanied children and adolescents – undertake dangerous journeys. This report shows how the lack of safe and legal pathways for refugee and migrant children feeds a booming market for human smuggling and puts them at risk of violence, abuse and exploitation. It presents latest data on the scale of these movements, the major routes taken and the perils experienced by these children on the move in from of trafficking, exploitation and even deaths. Building on recent UNICEF policy proposals, it sets out ways that governments can better protect these vulnerable children.

Download the report | Download the executive summary

Uprooted: The Growing Crisis for Refugee and Migrant Children

Sep 6, 2016

Around the world, nearly 50 million children have migrated across borders or been forcibly displaced – and that’s a conservative estimate. More than half of these boys and girls fled violence and insecurity – 28 million in total. This report presents, for the first time, comprehensive global data about these children – where they are born, where they move, and some of the dangers they face along the way. The report sheds light on the truly global nature of childhood migration and displacement, highlighting major challenges in every region.

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Notes on the Data


International migrants: Persons living in a country or area other than their country of birth.

Refugees: Person who are outside their country of nationality or habitual residence, who cannot return due to a well-founded fear of being persecuted because of their race, religion, nationality, membership of a particular social group or political opinion. This number only accounts those who have been recognized as refugees or find themselves in refugee-like situations. Data are presented in thousands.

Asylum seeker: Persons whose application for asylum or refugee status is pending at any stage in the asylum procedure. If granted, persons are regarded as refugees. Data are presented in thousands.

Internal displaced persons: Persons who have been forced or obliged to flee or leave their homes or places of habitual residence, in particular as a result of or in order to avoid the effects of armed conflict, situations of generalized violence, violations of human rights or natural or human-made disasters, and who have not crossed an internationally recognized border. Data presented in this table refer only to persons displaced due to conflict and violence. Data are presented in thousands.

Ratification of legal originating from instruments related to children and international migration: Number of legal instruments related to children and international migration ratified by each country. The legal instruments refer to: (a) the 1989 Convention on the Rights of the Child, (b) Convention relating to the Status of Refugees 1951 and Protocol 1967, (c) the 2000 Protocol to Prevent Suppress and Punish Trafficking in Persons, Especially Women and Children (d) the 2000 Protocol against the Smuggling of Migrants by Land, Sea, Air, (e) the 1990 International Convention on the Protection of the Rights of All Migrants and Members of Their Families. Data are expressed in numbers.


Total population of country or area: United Nations, Department of Economic and Social Affairs, Population Division, World Population Prospects: The 2015 Revision, United Nations, New York, 2015.

International migrants by country of destination: United Nations, Department of Economic and Social Affairs, Population Division, Trends in International Migrant Stock: The 2015 Revision, United Nations, New York, 2015. Share of under 18 calculated by UNICEF based on United Nations, Department of Economic and Social Affairs, Population Division, Trends in International Migrant Stock: Migrants by Age and Sex, United Nations, New York, 2015.

International migrants by country of origin: United Nations, Department of Economic and Social Affairs, Population Division, Trends in International Migrant Stock: Migrants by Destination and Origin. United Nations, New York, 2015.

Refugees by country of asylum: United Nations High Commissioner for Refugees, Global Trends: Forced Displacement in 2015, UNHCR, Geneva, 2016.

Refugees by country of origin: United Nations High Commissioner for Refugees, Global Trends: Forced Displacement in 2015. UNHCR, Geneva, 2016. Share of under 18 from UNHCR unpublished data, cited with permission.

Asylum seekers: United Nations High Commissioner for Refugees, Global Trends: Forced Displacement in 2015, UNHCR, Geneva, 2016.

Internally displaced persons (IDPs): Internal Displacement Monitoring Centre, Global Internal Displacement Database (GIDD), IDMC, 2015.

Legal frameworks: United Nations Treaty Collection; see (as of 13 July 2016).

Call for Data

Comparable, reliable, timely, disaggregated and accessible data are essential for understanding and addressing the implications of migration for children and their families. Data need to cover a range of key questions, including who migrants and displaced persons are, how old they are, where they come from, when they move, where they move, why they move and how they fare.

A first step toward closing the data gaps about child migrants and refugees is identifying who and where those children are. Accounting for migrant children – especially refugee children – is fundamental for their protection. Beginning more than a decade ago, UNHCR declared unequivocally that  “the registration of children should always be a priority when registering persons of concern to UNHCR”. More consistent efforts to identify the origins and destinations of child refugees are also needed, including through the adoption of consistent and reliable techniques for determining the ages of children who arrive without documentation.  Population registers and censuses are essential tools for closing some of these gaps, particularly for non-refugee migrant children. As the predominant data source on international migration, every census should collect information on the country of birth, the country of citizenship, and the country of previous residence for respondents.

A second and equally important step toward closing data gaps is improving information about the well-being of children impacted by migration and displacement. Outcomes related to water and sanitation, education, gender, child protection, social inclusion and health need to be assessed for migrant and refugee children and considered in relation to the outcomes to native-born children. Data disaggregated by migratory status will be particularly relevant to monitor progress toward the Sustainable Development Goals addressing children and families in vulnerable situations. To bolster the overall quality of information about the well-being and progress of migrant children, pertinent administrative data should be more accessible and household surveys should be adjusted to include relevant migration questions. New technologies and data sources also have tremendous potential to improve current knowledge about migration movements. Data from social media, mobile phones and other sources can provide geo-spatial and temporal information about population movements in real time, facilitating timely and more relevant responses for people on the move. Continued investment in both new and traditional data sources will be essential to effectively meeting the rights and needs of children and families in the years to come.