Unauthorized immigrant population:

Year 2018: 11,570,000

Year 2019: 11,110,000

Year 2020: 10,510,000

Year 2022: 10,990,000

Source: Office of Homeland Security Statistics

https://ohss.dhs.gov/topics/immigration/unauthorized/population-estimates

"The provisional estimate of 11.7 million for 2023 is still below the historic peak of 12 million reached in 2008. The population grew by about 800,000 from 2022 to 2023, about 200,000 below undocumented population growth in 2000-2001, as shown in Figure 2."

https://cmsny.org/us-undocumented-population-increased-in-july-2023-warren-090624/

The unauthorized immigrant population in the United States grew to 11.0 million in 2022, according to new Pew Research Center estimates based on the 2022 American Community Survey, the most recent year available. The increase from 10.5 million in 2021 reversed a long-term downward trend from 2007 to 2019. This is the first sustained increase in the unauthorized immigrant population since the period from 2005 to 2007.

However, the number of unauthorized immigrants living in the U.S. in 2022 was still below the peak of 12.2 million in 2007.


While these new arrivals probably increased the U.S. unauthorized immigrant population, it remains to be seen how much. New arrivals can’t simply be added to the existing estimate because some unauthorized immigrants leave the country every year, some die and some gain lawful status.

https://www.pewresearch.org/short-reads/2024/07/22/what-we-know-about-unauthorized-immigrants-living-in-the-us/

A quick google search indicates that there are an estimated 11,000,000 unauthorized in the US currently.