More people around the world than ever are living abroad and the United States remains the most popular destination, according to new data.
The United Nations Population Division reported that 232 million people, or 3.2 per cent of the world's population, are now living outside their homeland - a big increase from the 175 million in 2000 and 154 million in 1990.
Undersecretary-General for Economic and Social Affairs Wu Hongbo said: "Migration broadens the opportunities available to individuals and is a crucial means of broadening access to resources and reducing poverty."
Nearly two-thirds of all international migrants live in Europe and Asia, with Europe hosting 72 million and Asia 71 million, the UN report said.
The new estimates found that developed countries north of the equator are home to 136 million international migrants, compared to 96 million in the developing south.
Between 1990 and 2013, the north gained a larger number of international migrants than the south. But since 2000, the growth in the south has been more rapid than in the north.
Nonetheless, international migration remains highly concentrated, with half of all international migrants living in 10 countries this year.
The US hosts the largest number, 45.8 million, and it has gained the largest number of international migrants since 1990 - nearly 23 million, which is equal to one million additional migrants per year, the report said.
Russia was second with 11 million, followed by Germany with 9.8 million, Saudi Arabia with 9.1 million, the United Arab Emirates and the United Kingdom with 7.8 million, France with 7.4 million, Canada with 7.3 million, and Australia and Spain with 6.5 million.
John Wilmoth, director of the Population Division, said: "New sources and destinations of migrants are emerging, and in some cases, countries have become important points of origin, transit and destination simultaneously."
Asia has seen the largest increase of international migrants since 2000, adding about 20 million migrants.
This was mainly as a result of increasing demand for foreign labour in the oil-producing countries of western Asia and in Southeast Asian countries with rapidly growing economies such as Malaysia, Singapore and Thailand, Wilmoth said.
According to the new data, released ahead of a high-level UN event on International Migration and Development next month, nearly 75 per cent of international migrants are of working age, between 20 and 64, and 48 per cent are women.