Unauthorized Immigrants: Length of Residency, Patterns of Parenthood

Nearly two-thirds of the 10.2 million unauthorized adult immigrants in the United States have lived in this country for at least 10 years and nearly half are parents of minor children, according to new estimates by the Pew Hispanic Center, a project of the Pew Research Center.

These estimates are based on data from the U.S. Census Bureau’s March 2010 Current Population Survey, augmented with the Center’s analysis of the demographic characteristics of the unauthorized immigrant population using a "residual estimation methodology" that the Center has employed for many years.

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