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.

Fact Tank Feb. 11, 2016

5 facts about Mexico and immigration to the U.S.

From 1965 to 2015, more than 16 million Mexicans migrated to the U.S. in one of the largest mass migrations in modern history. But Mexican migration to the U.S. has slowed in recent years. Today, Mexico also increasingly serves as a land bridge for Central American immigrants traveling to the U.S.

Feb. 3, 2016

Homeland Security produces first estimate of foreign visitors to U.S. who overstay deadline to leave

Out of 45 million U.S. arrivals by air and sea whose tourist or business visas expired in fiscal 2015, the agency estimates that about 416,500 people were still in the country this year.

Fact Tank Jan. 19, 2016

Key facts about immigrants eligible for deportation relief under Obama’s expanded executive actions

The U.S. Supreme Court is expected in April to hear a lawsuit by Texas and 25 other states that seeks to block presidential executive actions offering deportation relief and work permits to unauthorized immigrants.

Fact Tank Dec. 31, 2015

Your favorite Fact Tank data in 2015

From Millennials in the workforce to religion in America, our most popular posts told important stories about trends shaping our world.

Fact Tank Nov. 20, 2015

What we know about illegal immigration from Mexico

Pew Research Center tracks the origins of unauthorized immigrants, their participation in the labor force and where in the U.S. they are settling.

Fact Tank Nov. 19, 2015

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.

Hispanic Nov. 19, 2015

More Mexicans Leaving Than Coming to the U.S.

Between 2009 and 2014, about 140,000 more Mexican immigrants have returned to Mexico from the U.S. than have migrated here, citing family reunification as the main reason for leaving.

U.S. Politics Oct. 8, 2015

On Immigration Policy, Wider Partisan Divide Over Border Fence Than Path to Legal Status

As immigration emerges as a key issue in the presidential campaign, there is little common ground between Republicans and Democrats in views of several immigration policy proposals.

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Hispanic Sep. 28, 2015

Statistical Portrait of the Foreign-Born Population in the United States, 1960 – 2013

There were a record 41.3 million immigrants living in the U.S. in 2013, making up 13.1% of the nation’s population, a fourfold increase since 1960. These interactive charts explore immigration population trends, from origin to length of time in the U.S., to age and language use.

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Hispanic Sep. 28, 2015

Selected U.S. Immigration Legislation and Executive Actions, 1790 – 2014

Explore how immigration in the U.S. was shaped by laws and acts in this interactive timeline of U.S. immigration legislation since the 1790s.