Roughly 317,000 immigrants from 10 countries have this status after fleeing dangerous conditions at home. Learn about where these protections stand.
In this Q&A and video, learn about the methods and data sources the Center used to estimate the number of unauthorized immigrants in Europe.
A new Pew Research Center analysis estimates that at least 3.9 million unauthorized immigrants – and possibly as many as 4.8 million – lived in Europe in 2017. Learn how we conducted the first comprehensive estimate of Europe's unauthorized immigrant population in over a decade.
The size of Europe’s unauthorized immigrant population in 2017 was less than half the number in the United States.
A decline in U.S. refugee admissions comes at a time when the number of refugees worldwide has reached the highest levels since World War II.
Jeffrey S. Passel, senior demographer, on the research techniques used to derive the unauthorized immigrant population estimate in the U.S. and the challenges involved.
While Mexico is the United States' largest source of immigrants, the number of Mexican immigrants living in the U.S. illegally has declined since 2007.
Canada resettled 28,000 refugees in 2018, similar to its 2017 total. Meanwhile, the U.S. resettled 23,000, down from the previous year.
More than 40 million people living in the U.S. were born in another country, accounting for about one-fifth of the world’s migrants in 2017.
In 2017, an estimated 10.5 million unauthorized immigrants lived in the United States, down from a peak of 12.2 million in 2007. Explore trends in the unauthorized immigrant population for U.S. states, as well as for birth countries and regions.