About 9% of U.S. births in 2023 were to unauthorized or temporary legal immigrant mothers
Generally, the trends in births to unauthorized immigrants follow the growth and decline of the unauthorized immigrant population.

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.