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).
Where this page sits
Up a level, or across to the neighbors.
Guide
Secretary of State phone number by state
The national explainer above this page: what changes between jurisdictions, and why.
Open the hub → SectionSecretary of State directory
Every filing the state business office takes, state by state.
Open the section → StateDelaware business filings
Every filing a business makes in Delaware, gathered on one page.
Open Delaware → In DelawareSecretary of State Name Reservation in Delaware
Name reservation, state by state
Read the guide → In DelawareSecretary of State dissolution in Delaware
Secretary of State dissolution, state by state
Read the guide → In DelawareBusiness merger filing in Delaware
Articles of Merger, state by state
Read the guide → In DelawareSecretary of State in Delaware
The Secretary of State, state by state
Read the guide →