The unauthorized immigrant population in the United States reached 10.5 million in 2021. That was a modest increase over 2019 but nearly identical to 2017.
From 2009 to 2012, the population of unauthorized immigrants rose in seven states and fell in 14. Losses in 13 states were due to drops in the number of unauthorized immigrants from Mexico.
The annual inflow of unauthorized immigrants to the U.S. was nearly two-thirds smaller in the March 2007 to March 2009 period than it had been from March 2000 to March 2005.