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.
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.
There were 10.5 million unauthorized immigrants in the U.S. in 2017. The number of Mexican unauthorized immigrants declined since 2007.
The latest Pew Research Center data estimates there were 10.5 million unauthorized immigrants living in the U.S. in 2017, down significantly from a decade prior. In this video, our researchers go behind the scenes to explain the “how” and “why” behind determining these new numbers.
The number of Mexican unauthorized immigrants has fallen since its peak of 6.9 million in 2007 and was lower in 2017 than in any year since 2001.
In 2016, a third of unauthorized immigrant adults were proficient in English – up from a quarter in 2007.
Proposals to change the U.S. immigration system have received renewed attention under the Trump administration. Read key details about U.S. immigration programs.
Border apprehensions are rising quickly and the demographic profile of apprehended migrants is changing.
In 2016, the 20 U.S. metro areas with the most unauthorized immigrants were home to 6.5 million of them, or 61% of the estimated total.