Estimate of illegal immigrant population in 2010

The total number of illegal immigrants is stable and its labor force participation rate remains very high. They are here to work.
The Pew Hispanic Center released an estimate that the total illegal population, of which 58% is Mexican, is unchanged in 2010 from 2009, about 11.2 million, of which 8 million are in the workforce. “This stability in 2010 follows a two-year decline from the peak of 12 million in 2007 to 11.1 million in 2009 that was the first significant reversal in a two-decade pattern of growth. Unauthorized immigrants were 3.7% of the nation’s population in 2010.” “Despite the recent decline and leveling off, the number of unauthorized immigrants living in the United States has tripled since 1990, when it was 3.5 million. The size of this population grew by a third since 2000, when was 8.4 million.”
What the reports says about the illegal workforce:
There were 8 million unauthorized immigrants in the workforce in March 2010, down slightly from 2007, when there were 8.4 million. They represent 5.2% of the workforce, similar to their proportion for the past half-decade, when they represented 5% to 5.5% of workers. The labor force participation rate is 71%, compared to 51% for the entire 306 million population.


State patterns differ widely, but generally states with large numbers or shares of unauthorized immigrants also have relatively large numbers or shares in the workforce.
States with the largest share of unauthorized immigrants in the workforce include Nevada (10%), California (9.7%), Texas (9%) and New Jersey (8.6%). Because unauthorized immigrants are more likely than the overall population to be of working age, their share in a state’s workforce is substantially higher than their share of a state’s population. California also has the largest number of people in the labor force who are unauthorized immigrants (1.85 million), followed by Texas (1.1 million), Florida (600,000) and New York (450,000.).
The number of unauthorized immigrants in the nation’s workforce, 8 million in March 2010, also did not differ from the Pew Hispanic Center estimate for 2009. As with the population total, the number of unauthorized immigrants in the labor force had decreased in 2009 from its peak of 8.4 million in 2007. They made up 5.2% of the labor force.
The number of children born to at least one unauthorized-immigrant parent in 2009 was 350,000 and they made up 8% of all U.S. births, essentially the same as a year earlier. An analysis of the year of entry of unauthorized immigrants who became parents in 2009 indicates that 61% arrived in the U.S. before 2004, 30% arrived from 2004 to 2007, and 9% arrived from 2008 to 2010.
Other key points from the new report include:
The decline in the population of unauthorized immigrants from its peak in 2007 appears due mainly to a decrease in the number from Mexico, which went down to 6.5 million in 2010 from 7 million in 2007. Mexicans remain the largest group of unauthorized immigrants, accounting for 58% of the total.
The number of unauthorized immigrants decreased from 2007 to 2010 in Colorado, Florida, New York and Virginia. The combined population in three contiguous Mountain West states-Arizona, Nevada and Utah-also declined.
In contrast to the national trend, the combined unauthorized immigrant population in three contiguous West South Central states-Louisiana, Oklahoma and Texas-grew from 2007 to 2010.
Although the number of unauthorized immigrants in the U.S. is below 2007 levels, it has tripled since 1990, when it was 3.5 million and grown by a third since 2000, when it was 8.4 million.
The estimates are based on data from the U.S. Census Bureau’s Current Population Survey, augmented with the Pew Hispanic Center’s analysis of the demographic characteristics of the unauthorized immigrant population using a “residual estimation methodology.”
Although the estimates indicate trends in the size and composition of the unauthorized-immigrant population, they are not designed to answer the question of why these changes occurred. There are many possible factors. The deep recession that began in the U.S. economy officially ended in 2009, but recovery has been slow to take hold and unemployment remains high. Immigration flows have tended to decrease in previous periods of economic distress.
The period covered by this analysis also has been accompanied by changes in the level of immigration enforcement and in enforcement strategies, not only by the federal government but also at state and local levels. Immigration also is subject to pressure by demographic and economic conditions in sending countries. This analysis does not attempt to quantify the relative impact of these forces on levels of unauthorized immigration.
The report, “Unauthorized Immigrant Population: National and State Trends, 2010,” written by Jeffrey S. Passel and D’Vera Cohn, is available at the Pew Hispanic Center’s website, www.pewhispanic.org.
The Pew Hispanic Center, a project of the Pew Research Center, is a nonpartisan, non-advocacy research organization based in Washington, D.C. and is funded by The Pew Charitable Trusts.

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