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Welcome to the Sonoma County Clerk's Office

William F. Rousseau, Sonoma County Clerk-Recorder-Assessor


I am honored to serve you as Sonoma County's Clerk-Recorder-Assessor and I'm always interested in receiving your feedback and questions.

You're invited to contact me at my office in the Assessor's Division or contact me by email. Please visit our Contact Us page for our division office locations and telephone numbers.


William F. Rousseau
Sonoma County Clerk-Recorder-Assessor

→ → Consumer Scam Alert ← ← → → Consumer Scam Alert ← ←→ → Consumer Scam Alert ← ←

Consumers should be wary of solicitations requesting fees ranging from $100 - $500 for services that are offered at our office for a substantially lower cost or at no charge.

The County Clerk charges a nominal fee for a filing a Fictitious Business Name Statement

Sonoma County business owners have received solicitations from a private company encouraging them to renew their Fictitious Business Name Statements for a fee of $150. Business owners can deal directly with the County Clerk’s Office when filing. Customers have two options when filing a Fictitious Business Name Statement. With either option, the cost of filing a Fictitious Business Name Statement is $40 for the first business name and the first owner name.  Each additional name is $9.  Forms are available in our office or online at

In Person: Payment can be made by cash or check. Credit and debit cards are accepted, although a $2.50 convenience fee is charged with the usage of a card. 

By Mail: Mail your filing and a check to: Clerk-Recorder-Assessor, 2300 County Center Dr., B177, Santa Rosa, CA 95403: Mail processing time is 1 - 2 weeks.

Our Office:

The County Clerk Division of the Clerk-Recorder-Assessor Department has a variety of duties, including issuing marriage licenses, filing fictitious business name statements, processing notary bonds, handling environmental documents, and performing civil marriage ceremonies. The County Clerk Division also issues certified copies of marriage, birth and death records on behalf of the County Recorder.

The Sonoma County Clerk's Office is open Monday through Friday from 8:00 a.m. to 5:00 p.m. We are located in Santa Rosa, in the La Plaza Building B at the County of Sonoma Administration Center. Our street and mailing address is:

Sonoma County Clerk
2300 County Center Drive, Suite B177
Santa Rosa, CA 95403

Payment Methods Accepted by our Office:

In Person:

  • Cash, checks or credit/debit cards are accepted as payment for any services or products purchased.  An additional $2.50 convenience fee applies with the use of a credit or debit card.
Sonoma County Clerk's Office • La Plaza West Building
2300 County Center Drive Suite B-177
Santa Rosa, California 95403

Online Orders:

  • For convenience, Sonoma County has partnered with an independent company, VitalChek Network, Inc., through which an order may be processed. VitalChek can be reached through its website, All major credit cards are accepted, including American Express®, Discover®, MasterCard® and Visa®. (Note - additional fees are charged by VitalChek for using this service.)

By Mail:

  • Check or money order only
Sonoma County Clerk's Office
2300 County Center Drive Suite B-177
Santa Rosa, California 95403

24 hour Information Line:

For information concerning marriage licenses, marriage ceremonies, the Deputy for a Day program, Fictitious Business Names, Notary Public Oaths and certified copies of birth, marriage and death certificates available through the County Clerk's Office, please call our 24 hour information line at (707) 565-3700.

Accessibility Assistance:

The Sonoma County Clerk uses the Section 508 standards as guidelines for pages within our website. We are actively engaged in the ongoing process of testing, developing, and updating our website for compliance with these accessibility standards. If you have a disability and the format of any material on our website interferes with your ability to access information on this site, please visit our Accessibility Assistance Information page for information on how to request help.

If you would like more information about vital records available through the County Clerk's Office, please call our 24 hour information line at (707) 565-3700, or you may call our office phone at (707) 565-3800 during regular business hours, or visit our office Monday through Friday 8 a.m. to 5 p.m.

We are always interested in receiving your feedback and/or questions.

Important Notice: The staff of the Clerk-Recorder-Assessor's Office are forbidden by California legal codes to practice law or provide legal advice; this prohibition includes giving advice about what forms you might need or how you should fill them out.