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Missouri . Contact directory

How to reach the Missouri Secretary of State.

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

Primary phone
573-751-4153
Mon-Fri 8am-5pm CT
Mailing address
P.O. Box 778, Jefferson City, MO 65102
Physical address
600 W. Main Street, Jefferson City, MO 65101
Fax
573-751-5841

The right phone for the right question

Franchise tax and corporate income tax
573-751-4541 (MO Department of Revenue, Corporate Tax)
Expedited filings
No premium expedite; online channel is fastest
573-751-4153 (expedite via online portal)

Most calls to the Missouri 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 Missouri Secretary of State?
The primary phone for the Missouri Secretary of State, Corporations Division is 573-751-4153. Office hours are Mon-Fri 8am-5pm CT.
What are the Missouri Secretary of State office hours?
Office hours are Mon-Fri 8am-5pm CT. Online filings can be submitted 24/7.
What is the Missouri Secretary of State mailing address?
Mailing address: P.O. Box 778, Jefferson City, MO 65102. Physical office: 600 W. Main Street, Jefferson City, MO 65101.
How do I speak to a person at the Missouri Secretary of State?
Call 573-751-4153 during business hours.
Does the Missouri Secretary of State offer expedited service?
No premium expedite; online channel is fastest.
Can I email the Missouri Secretary of State?
Email contact varies by department.
Can I visit the Missouri Secretary of State office in person?
Yes, the physical office is at 600 W. Main Street, Jefferson City, MO 65101.

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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 Missouri Secretary of State, Corporations Division or any Secretary of State office. You may file directly with the Missouri Secretary of State, Corporations Division. Information on this page is for general guidance only and is not legal, tax, or accounting advice. Fees and deadlines verified against the Missouri Secretary of State, Corporations Division as of June 2026 and may change. For entity-specific guidance, consult a licensed Missouri 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.