Illinois's Legal Information

Illinois Business Name Search, Secretary of State, and LLC Costs

Illinois Articles of Organization Website:

Name Availability a preliminary check on name availability.

Physical Address:
Chicago Office:
69 W. Washington Suite 1240
Chicago, IL 60602
Phone: 312-793-3380

Springfield Office:
Michael J. Howlett Bldg.
501 S. 2nd Street, Rm 350
Springfield, IL 62756
Phone: 217-782-6961

Questions about filing Articles of Organization:  217-524-8008 x 7736

LLC Documents:

Filing Fee:  $150, plus $100 if expedited.

Filing Instructions:

File online at or by mail.

For step-by-step audio instructions on how to prepare and file your Articles of Organization, check out our LLC Packages.

To return to the list of links to the information for each state: