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Become a Member Today

You can make an extraordinary impact in our community.

To become a Member,  just complete the following three forms on your computer: Membership Application, Conflict of Interest Form, and Focus Area Committee Policy, print the forms, sign the forms, enclose your check f(or indicate other payment method), and mail everything to the address shown below.  Your entire membership contribution goes toward the $100,000 gift to one Sonoma Valley nonprofit organization.  Membership contributions are due by December 1.

As a nonprofit, Impact100 Sonoma needs your support to cover our  annual operating expenses for our website, email newsletters, educational programs, telephone, photocopying of grant applications, etc.  Please consider helping with an additional gift with your membership contribution.  Matching gifts from Members’ employers are most welcome and will be applied to the modest costs of our operating budget.

Impact100 Sonoma  
P.O. Box 1958
Sonoma, CA  95476

Please contact us with any questions at admin@impact100sonoma.org


Impact100 Sonoma is incorporated in the state of California as Women Giving as One, Inc. and is registered with the Registry of Charitable Trusts (Department of Justice of the State of California – #CT 0155935).   Impact100 Sonoma is classified as tax-exempt under Internal Revenue Code section 501(c)(3).   As a 501 (c) (3) organization, we are classified as a public charity and contributions are deductible under section 170 of the Internal Revenue Code.  Impact100 Sonoma is also qualified to receive tax deductible bequests.  Our tax id number (Employer Identification Number) is 27-0845497. 

Forms to Download
Membership Application
Conflict of Interest Policy

Focus Area Committee Policy

[1] A Note About Conflicts of Interest
We are committed to acting with integrity in all of our relationships, and to selecting our grant recipients through an honest and fair process. In support of this commitment, Impact100 Sonoma has adopted a Conflict of Interest Policy that requires disclosure of relationships between our Members and any grant applicant.

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