It depends on where the worker is working. Federal minimum wage is $7.25, but Illinois’ minimum wage is $8.25, and in Cook County it is $11.00 and in the city of Chicago it is $12.00. The rates are lower for tipped employees.
Chicago – https://www.cityofchicago.org/city/en/depts/mayor/supp_info/minimum-wage.html
Cook County – https://www.cookcountyil.gov/service/minimum-wage-ordinance
https://www.minimum-wage.org/