Pew Research Center Mar. 2, 2011

If there are now fewer unauthorized immigrants in the U.S. where did they go?

Senior research staff answer questions from readers relating to all the areas covered by our seven projects, ranging from polling techniques and findings, to media, technology, religious, demographic and global attitudes trends.

Hispanic Feb. 1, 2011

Unauthorized Immigrant Population: National and State Trends, 2010

As of March 2010, 11.2 million unauthorized immigrants were living in the U.S., virtually unchanged from a year earlier and remaining well below the population’s peak of 12 million in 2007. The number of unauthorized immigrants in the nation’s workforce (8 million) also has not changed in the past year.

Hispanic Oct. 28, 2010

Illegal Immigration Backlash Worries, Divides Latinos

About four-in-five of the nation’s estimated 11.1 million unauthorized immigrants are of Hispanic origin; a new national survey finds that Latinos are divided over what to do with these immigrants.

Hispanic Sep. 1, 2010

U.S. Unauthorized Immigration Flows Are Down Sharply Since Mid-Decade

The annual inflow of unauthorized immigrants to the U.S. was nearly two-thirds smaller in the March 2007 to March 2009 period than it had been from March 2000 to March 2005. This decline contributed to an overall 8% reduction in the unauthorized immigrant population, which fell to 11.1 million in 2009 from 12 million in 2007. The decrease represents the first significant reversal in the growth of this population over the past two decades.

Hispanic Aug. 11, 2010

Unauthorized Immigrants and Their U.S.-Born Children

Unauthorized immigrants comprise about 4% of the adult population, but their children make up a much larger share of both the newborn population (8%) and the overall child population (7% of those younger than age 18) in this country.

U.S. Politics May. 12, 2010

Public Supports Arizona Immigration Law

A majority approves of the new law, and larger percentages support requiring people to produce identification documents for police and allowing authorities to detain people unable to verify their legal status.

Hispanic Apr. 29, 2010

Hispanics and Arizona’s New Immigration Law

Past Pew Research Center reports have found that Latinos are the ethnic group most likely to be illegal immigrants and that Americans see Hispanics as the racial/ethnic group most often subjected to discrimination. Find more demographic and public opinion research related to the new Arizona law in a just-released fact sheet.

Hispanic Jul. 22, 2009

Mexican Immigrants: How Many Come? How Many Leave?

The flow of immigrants from Mexico to the United States has declined sharply since mid-decade, but there is no evidence of an increase during this period in the number of Mexican-born migrants returning home from the U.S.

Hispanic Jul. 2, 2009

Recession Slows — but Does Not Reverse — Mexican Immigration

The flow of immigrants from Mexico to the U.S. has declined sharply since mid-decade, but there is no apparent increase in the number of Mexican-born migrants returning home.

Hispanic Apr. 14, 2009

A Portrait of Unauthorized Immigrants in the United States

Unauthorized immigrants living in the U.S. are more geographically dispersed than in the past and are more likely than either U.S.-born residents or legal immigrants to live in a household with a spouse and children. But the recent rapid growth in the undocumented immigrant labor force has come to a halt. The new report also includes population and labor force estimates for each state.