The 94110 zip code– which includes the Mission, Bernal Heights, and some of Noe Valley– houses San Francisco's highest concentration of illegal immigrants, according to a recent study.
The Public Policy Institute of California released a study this month in which researchers estimated the number of illegal immigrants in the state by analyzing tax records and using complex mathematical models that no journalist could actually understand.
Specifically, they looked at the number of people with Individual Taxpayer Identification Numbers (ITINs) who filed federal income taxes. The IRS issues those identification numbers to people who don't have Social Security numbers so they can file their taxes.
Funny how the government stops caring about your visa status in tax season. But we digress.