Explore U.S. unauthorized immigrant population trends for states of residence, as well as for international regions and largest countries of birth, based on Pew Research Center estimates. In 2014, an estimated 11.1 million unauthorized immigrants lived in the U.S., unchanged since 2009 and down from a peak of 12.2 million in 2007. For more, see our report and tables: Overall Number of U.S. Unauthorized Immigrants Holds Steady Since 2009. There is also more information in this related report: Size of U.S. Unauthorized Immigrant Workforce Stable After the Great Recession