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Illinois . Contact directory

How to reach the Illinois Secretary of State.

Direct phone number, hours, mailing and physical addresses, and the right phone for the right question. Plus the related Illinois departments most business owners need.

Primary phone
217-524-8008
Mon-Fri 8am-4:30pm CT
Mailing address
501 S. Second Street, Room 350, Springfield, IL 62756
Physical address
501 S. Second Street, Room 350, Springfield, IL 62756
Fax
217-782-4528

The right phone for the right question

Franchise tax and corporate income tax
217-785-3707 (Illinois Department of Revenue, Business Income Tax)
Expedited filings
24-hour expedite: +$100
217-524-8008 (24-hour expedite available; same-day for select Corp filings)

Most calls to the Illinois SoS are about things File.Business can answer instantly

"What is my entity's status?"
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"When is my AR due?"
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"How do I change RA?"
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"Can I reinstate?"
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FAQ

Frequently asked questions

What is the phone number for the Illinois Secretary of State?
The primary phone for the Illinois Secretary of State, Department of Business Services is 217-524-8008. Office hours are Mon-Fri 8am-4:30pm CT.
What are the Illinois Secretary of State office hours?
Office hours are Mon-Fri 8am-4:30pm CT. Online filings can be submitted 24/7.
What is the Illinois Secretary of State mailing address?
Mailing address: 501 S. Second Street, Room 350, Springfield, IL 62756. Physical office: 501 S. Second Street, Room 350, Springfield, IL 62756.
How do I speak to a person at the Illinois Secretary of State?
Call 217-524-8008 during business hours.
Does the Illinois Secretary of State offer expedited service?
24-hour expedite: +$100.
Can I email the Illinois Secretary of State?
Email contact varies by department.
Can I visit the Illinois Secretary of State office in person?
Yes, the physical office is at 501 S. Second Street, Room 350, Springfield, IL 62756.

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Disclosure. File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with the Illinois Secretary of State, Department of Business Services or any Secretary of State office. You may file directly with the Illinois Secretary of State, Department of Business Services. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Fees and deadlines verified against the Illinois Secretary of State, Department of Business Services as of June 2026 and may change. For entity-specific guidance, consult a licensed Illinois attorney or CPA.

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File.Business is a private business filing and compliance service. We are not a government agency and are not affiliated with any Secretary of State office. You may file directly with the appropriate state agency. SOC 2 Type II audited. 220,000+ businesses formed since 2017.