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  4. Unauthorized Aliens
  5. Estimates of the Unauthorized Alien Population Residing in the United States


Estimates of the Unauthorized Alien Population Residing in the United States

This report provides estimates of the unauthorized alien population living in the United States. It includes breakdowns by period of entry, region and country of origin, state of residence, age, and sex. 

Unauthorized aliens are not authorized to be in the country. Most entered the country without inspection or were temporary residents who stayed past the date they were required to leave.  

Download Data

As some terminology in reports do change, we maintain previously posted reports and datasets as originally approved and published.



Data File File Extension File size Date Posted Report Year Data Category categories
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2018-January 2022 pdf 644.74 KB 04/18/2024 2022 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2015-January 2018 pdf 855.98 KB 01/31/2021 2018 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2015 pdf 562.83 KB 12/31/2018 2015 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2014 pdf 160.42 KB 07/31/2017 2014 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2012 pdf 672.61 KB 03/31/2013 2012 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2011 pdf 444.73 KB 03/31/2012 2011 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2010 pdf 481.41 KB 02/28/2011 2010 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2009 pdf 360.58 KB 01/31/2010 2009 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2008 pdf 226.04 KB 08/28/2009 2008 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2007 pdf 291.31 KB 09/30/2008 2007 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2006 pdf 576.11 KB 08/31/2007 2006 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: January 2005 pdf 220.49 KB 08/31/2006 2005 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: 1996 pdf 94.99 KB 09/28/2015 1996 Population Estimates 45
Estimates of the Unauthorized Immigrant Population Residing in the United States: 1990 to 2000 pdf 490.97 KB 09/28/2015 2000 Population Estimates 45
Executive Summary Estimates of the Unauthorized Immigrant Population Residing in the United States: 1990 to 2000 pdf 108.19 KB 01/31/2003 2000 Population Estimates 45

Last updated: February 7, 2025

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