In 2022, California and Texas had the highest populations of unauthorized immigrants, with 2.6 million and 2.1 million respectively. These two states accounted for 42% of the total unauthorized immigrant population in the US, according to the Office of Homeland Security Statistics. Following these two, Florida, New Jersey, Illinois, and New York also had large populations of unauthorized immigrants, according to the Office of Homeland Security Statistics
California had 2.6 million unauthorized immigrants, while Texas had 2.1 million.
http://www.newsweek.com/map-shows-states-illegal-immigration-2010192