Log in


Please join us. Together, our voices are stronger, our financial contribution is greater, and our impact is deeper.

To become a member a woman must be 18 or older. 

100% of every $1,000 donation is awarded each year in grants that benefit the Sonoma Valley community.

Please consider joining as a Member Plus by making an additional tax-deductible contribution to support Impact100 Sonoma’s essential operating expenses. We depend on Member Plus contributions to help defray the operational costs of our volunteer organization. We are proud to say that many of our members go above and beyond the basic membership and contribute additional funds. 

Please consider making an additional contribution to increase our 2023 grants pool.  This donation is tax-deductible and separate from your contribution as a Member or MemberPlus. Use the “Donate” button at the top of the page.

Membership Categories

Basic Membership:  $1,000

Member Plus Levels:

  • Community Visionary: $2000
  • Community Leader: $1500
  • Community Advocate: $1200
  • Community Partner: $1100

Shared Memberships

Here’s how it works: Two women = one full membership = 1 vote. Each woman is responsible for finding a partner and they will split the membership fee of $1,000. As full members, both can participate in all activities and committees with the exception that they will share one vote to decide which nonprofits will receive grants. Learn more HERE.

Payment Options

By Check
If you would like to make your membership donation by check, download and fill out the Impact100 Membership form.  Mail it along with your check to Impact100 Sonoma, P.O. Box 1958, Sonoma, CA 95476.

By Credit Card

Impact100 Sonoma offers the option to pay by credit or debit card on our website. You may pay online through your member profile with your credit or debit card.

Other Ways to Join

To learn about other tax-advantaged ways to make your membership donation, click HERE.

Want to support Sonoma Valley in other ways?

  • Individuals can support our community through direct donations, by sponsoring a member, or through Tribute or Legacy gifts.   
  • Businesses can show their support by sponsoring an employee, an event through direct or in-kind donations, or by underwriting our work.         

Join Now
To become an Impact100 Sonoma member, select your membership level below and click "Next" to complete the process: 

Warning: browser cookies disabled. Please enable them to use this website.

Select membership level

* Mandatory fields
* Membership level


A Just & Thriving Sonoma Valley


Empowering women of Sonoma Valley to invest in a more sustainable nonprofit community through collective giving and responsible stewardship.

Impact100 Sonoma is a member of Philanos

Impact100 Sonoma ©2022. All rights reserved

Impact100 Sonoma
P.O. Box 1958
Sonoma, CA 95476
(707) 939-5007

Stay Connected:

Subscribe to our Newsletter


Powered by Wild Apricot Membership Software