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Delaware . Contact directory

How to reach the Delaware Secretary of State.

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

Primary phone
302-739-3073
Mon-Fri 8:30am-4pm ET
Business + corporate filings, name availability, document retrieval.
Mailing address
P.O. Box 898, Dover, DE 19903
For paper filings and corporate document delivery.
Physical address
401 Federal Street, Suite 4, Dover, DE 19901
Counter pickup, in-person filings, certified copies.
Fax
302-739-3812
Document filing fax (limited availability for expedites).
Related departments

The right phone for the right question

The Secretary of State handles corporate filings. For tax matters, payroll, insurance, and other compliance, you need the right department.

Franchise tax and corporate income tax
Annual franchise tax payments, business income tax filings, withholding accounts.
302-577-8200 (Delaware Division of Revenue)
Expedited filings + Same Day service
$50 (24-hour), $100 (Same Day), $200 (2-hour), $500 (1-hour). For founders needing fast turnaround.
302-739-3073 (Same Day / 24-Hour service requests)
Skip the call

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

Calling the Delaware Department of State means hold time during business hours. Most reasons people call have a faster alternative:

"What is my entity's status?"

Search the Delaware business records to see status, registered agent, last annual report, and document number.

Run a Delaware business search →
"When is my annual report due?"

Delaware annual reports are due June 1 for LLCs and March 1 for Corporations. See exact rules + fees.

See AR rules →
"How do I change my registered agent?"

File a Statement of Change. Delaware fee: $50. New agent must accept the appointment.

Change RA →
"My entity was dissolved. Can I reinstate?"

Yes, file a Reinstatement with back-fees. File.Business handles the whole process.

Reinstate →
FAQ

Frequently asked questions

What is the phone number for the Delaware Secretary of State?
The primary phone for the Delaware Department of State, Division of Corporations is 302-739-3073. Office hours are Mon-Fri 8:30am-4pm ET. For specific departments like franchise tax, expedited filings, or other agencies, see the directory above.
What are the Delaware Secretary of State office hours?
Office hours are Mon-Fri 8:30am-4pm ET. Phone support is available during these hours. Online filings can be submitted 24 hours a day through the Delaware Division of Corporations.
What is the Delaware Secretary of State mailing address?
Mailing address: P.O. Box 898, Dover, DE 19903. Physical office is at 401 Federal Street, Suite 4, Dover, DE 19901.
How do I speak to a person at the Delaware Secretary of State?
Call 302-739-3073 during business hours (Mon-Fri 8:30am-4pm ET). Wait times vary. For most common questions (status checks, deadlines, fees) the online Delaware Division of Corporations system has the answer faster.
Does the Delaware Secretary of State offer expedited service?
Yes. $50 (24-hour), $100 (Same Day), $200 (2-hour), $500 (1-hour). File.Business handles expedited filings for the same state fee plus our service charge.
Can I email the Delaware Secretary of State?
The Delaware Department of State, Division of Corporations primarily uses phone and online services for support. Email contact varies by department. Most common questions are addressed through the online filing system or by phone.
Can I visit the Delaware Secretary of State office in person?
Yes, the physical office is at 401 Federal Street, Suite 4, Dover, DE 19901. In-person counter service is available during business hours. Most founders use the online filing system because it is faster and produces the same result.

Ready to handle this the easy way?

Five minutes per filing. State fee passed through at cost. Audit trail and deadline tracking included.

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