Illinois has an estimated illegal immigrant population of about 525,000, according to a study released Tuesday.
That number represents about 4.1 percent of the state’s population, according to the nonpartisan Pew Hispanic Center, which based its analysis on census survey data.
The Illinois count is up from an estimated 500,000 in 2007. In 1990, there was an estimated 200,000, according to Pew.
Nationally, the number of illegal immigrants living in the U.S. last year was roughly 11.2 million, a number virtually unchanged from 2009.
Currently, illegal immigrants make up roughly 4 percent of the U.S. population — a number largely unchanged from previous years.