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Idaho . Contact directory

How to reach the Idaho Secretary of State.

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

Primary phone
208-334-2301
Mon-Fri 8am-5pm MT
Mailing address
P.O. Box 83720, Boise, ID 83720-0080
Physical address
450 N. 4th Street, Boise, ID 83702
Fax
208-334-2080

The right phone for the right question

Franchise tax and corporate income tax
208-334-7660 (ID State Tax Commission, Business Income Tax)
Expedited filings
No premium expedite; online channel is fastest
208-334-2301 (expedite via SOSBiz)

Most calls to the Idaho 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?"
Change RA →
"Can I reinstate?"
Reinstate →
FAQ

Frequently asked questions

What is the phone number for the Idaho Secretary of State?
The primary phone for the Idaho Secretary of State, Business Entities Section is 208-334-2301. Office hours are Mon-Fri 8am-5pm MT.
What are the Idaho Secretary of State office hours?
Office hours are Mon-Fri 8am-5pm MT. Online filings can be submitted 24/7.
What is the Idaho Secretary of State mailing address?
Mailing address: P.O. Box 83720, Boise, ID 83720-0080. Physical office: 450 N. 4th Street, Boise, ID 83702.
How do I speak to a person at the Idaho Secretary of State?
Call 208-334-2301 during business hours.
Does the Idaho Secretary of State offer expedited service?
No premium expedite; online channel is fastest.
Can I email the Idaho Secretary of State?
Email contact varies by department.
Can I visit the Idaho Secretary of State office in person?
Yes, the physical office is at 450 N. 4th Street, Boise, ID 83702.

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