The U.S. is a nation of immigrants. But unauthorized immigrants have become a source of political debate, and Congress and President Obama disagree over the best course of action to address issues such as deportations, legal status, education and benefits. For years, the Pew Research Center has estimated the size of the unauthorized immigrant population and surveyed the U.S. public about immigration.

HispanicNovember 29, 2016

Trump voters want to build the wall, but are more divided on other immigration questions

Though many Trump supporters say illegal immigration is a serious problem in the U.S. and want to build the wall, they are more divided on other questions.

HispanicNovember 17, 2016

Children of unauthorized immigrants represent rising share of K-12 students

About 3.9 million kindergarten through 12th-grade students in U.S. public and private schools in 2014 were children of unauthorized immigrants.

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HispanicNovember 3, 2016

Estimated unauthorized immigrant population, by state, 2014

California has by far the largest number of unauthorized immigrants, about 2.3 million in 2014.

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HispanicNovember 3, 2016

Unauthorized immigrant population trends for states, birth countries and regions

Explore U.S. unauthorized immigrant population trends for states of residence, as well as for international regions and largest countries of birth, based on Pew Research Center estimates.

HispanicNovember 3, 2016

Size of U.S. Unauthorized Immigrant Workforce Stable After the Great Recession

There were 8 million unauthorized immigrants in the U.S. working or looking for work in 2014, making up 5% of the civilian labor force, according to new Pew Research Center estimates using government data.

HispanicNovember 3, 2016

5 facts about illegal immigration in the U.S.

The number of unauthorized immigrants in the U.S. has stabilized in recent years after decades of rapid growth. Here are five facts from our latest analysis of this population.

HispanicOctober 26, 2016

Number of babies born to unauthorized immigrants in U.S. continues to decline

About 275,000 babies were born to unauthorized-immigrant parents in 2014, a decline from 330,000 in 2009.

HispanicSeptember 21, 2016

Unauthorized immigrant population stable for half a decade

The unauthorized immigrant population in the U.S. – 11.1 million in 2014 – has remained essentially stable since 2009 after nearly two decades of changes.

HispanicSeptember 20, 2016

Measuring illegal immigration: How Pew Research Center counts unauthorized immigrants in the U.S.

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.

HispanicSeptember 20, 2016

Overall Number of U.S. Unauthorized Immigrants Holds Steady Since 2009

The estimated total – 11.1 million in 2014 – has steadied since the end of the recession as the number declined from Mexico but grew from other countries.