This guide includes selected Pfau Library resources about undocumented populations, research materials on the history of DACA/DREAM Act, campus resources for undocumented CSUSB students, and more.
All statistics regarding undocumented residents are estimates only. For obvious reasons, people with undocumented status may not want to disclose that information to organizations that count populations (often, government agencies).
Dated Nov. 12, 2019. This "Voter Vitals" article from the Brookings Institute summarizes why it's so difficult to estimate undocumented populations and looks at common sources of data.
From the Migration Policy Institute, includes population estimates from 2000-2017. NOTE: MPI uses the term "illegal immigration" as a topic heading on their web site, and this usage is reflected in the title of the linked resource.