5 facts about illegal immigration in the U.S.
There were 10.5 million unauthorized immigrants in the U.S. in 2017. The number of Mexican unauthorized immigrants declined since 2007.

Jeffrey Passel is a senior demographer at Pew Research Center. He is a nationally known expert on immigration to the United States and the demography of racial and ethnic groups. Passel formerly served as principal research associate at the Urban Institute’s Labor, Human Services and Population Center. Passel has authored numerous studies on immigrant populations in America, focusing on such topics as undocumented immigration, the economic and fiscal impact of the foreign born, and the impact of welfare reform on immigrant populations. Passel regularly discusses the Center’s findings in print and broadcast media.