State of Illinois
Illinois Workers' Compensation Commission
100 West Randolph Street, Suite 8-200
Chicago, Illinois 60601
(866) 352-3033 (toll free statewide), (312) 814-6611, Fax: (312) 814-6523, TDD: (312) 814-2959
E-mail: iicoperations@mail.state.il.us
Click here to download free fillable PDF (Portable Document Format) versions of Illinois workers' compensation forms

Office of Self-Insurance Administration
701 South Second Street
Springfield, Illinois 62704
(217) 785-7084, Fax: (217) 785-6557