The Chicago Immmigration Court’s address is 525 W Van Buren St, Suite 500, Chicago, IL 60607. Its normal working hours run from 8 am to 4 pm Monday to Friday. The window, however, does not open until 8:30 and closes for lunch between 12 and 12:30 pm. The Court can be reached by telephone at 312-697-5800.
Keep in mind that opening hours, in-person hearings and telephone access have been drastically affected by the Covid-19 crisis, and that the situation is changing rapidly.