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Connecticut . Contact directory

How to reach the Connecticut Secretary of State.

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

Primary phone
860-509-6003
Mon-Fri 8:30am-4:30pm ET
Mailing address
P.O. Box 150470, Hartford, CT 06115-0470
Physical address
165 Capitol Avenue, Suite 1000, Hartford, CT 06106
Fax
860-509-6068

The right phone for the right question

Franchise tax and corporate income tax
860-297-5962 (CT Department of Revenue Services, Business Tax)
Expedited filings
Standard 7-10 business days; +$50 (24-hour)
860-509-6003 (24-hour expedite available)

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

"What is my entity's status?"
Run a search →
"When is my AR due?"
See AR rules →
"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 Connecticut Secretary of State?
The primary phone for the Connecticut Secretary of the State, Business Services Division is 860-509-6003. Office hours are Mon-Fri 8:30am-4:30pm ET.
What are the Connecticut Secretary of State office hours?
Office hours are Mon-Fri 8:30am-4:30pm ET. Online filings can be submitted 24/7.
What is the Connecticut Secretary of State mailing address?
Mailing address: P.O. Box 150470, Hartford, CT 06115-0470. Physical office: 165 Capitol Avenue, Suite 1000, Hartford, CT 06106.
How do I speak to a person at the Connecticut Secretary of State?
Call 860-509-6003 during business hours.
Does the Connecticut Secretary of State offer expedited service?
Standard 7-10 business days; +$50 (24-hour).
Can I email the Connecticut Secretary of State?
Email contact varies by department.
Can I visit the Connecticut Secretary of State office in person?
Yes, the physical office is at 165 Capitol Avenue, Suite 1000, Hartford, CT 06106.

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