Early voting starts Monday in Illinois and runs through November 7.
In Chicago, early voting is offered at sites in all 50 Chicago wards and at the Chicago Election Board's Loop "super site," 15 W. Washington St.
Find the locations and hours for the Chicago early voting sites here.
In suburban Cook County, there are 52 early voting sites, which can be found here.
For other Illinois counties, early voting locations and hours can be found on the Illinois State Board of Elections website.
The election is November 8.
UPDATE (3:11 p.m.): Cook County Clerk David Orr reports that 19,281 ballots were cast today as of 2:45 p.m.
He said the county has shattered its record for ballots cast on the opening day of early voting.
"The previous early voting opening day record, which was set in October 2012, was 13,779 ballots cast," his office said in a statement.