The foreign-born population in 2017 was 45.6 million, or about 13.8% of our total population. The pie chart below shows four segments: naturalized citizens, lawful permanent residents, persons in temporary protected status, and unauthorized..

A few observations: Asians with green cards are more likely to become citizens than persons from Mexico and Central America….the unauthorized population has declined in the past ten years (12.2 million in 2007, 10.5 million in 2017), gotten older (over 60% in U.S. for at least ten years)….5 million children born in the U.S. have at least one unauthorized parent, but births to unauthorized parents have declined sharply since a peak in 2006.

 

From various reports from Pew Research, including here