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Founded in 2009 by Annette Lomont and Christine Dohrmann, Impact100 Sonoma is a women’s philanthropic organization that pools its funds to support nonprofits from Schellville to Kenwood. Its vision is to support a thriving Sonoma Valley by empowering women to invest in a more sustainable nonprofit community through collective giving and responsible stewardship while emphasizing diversity, equity, and inclusion.

The first Impact100 chapter in California, Impact100 Sonoma is an affiliate of Impact100 Global and a member of the national Philanos network. The amount of funds it grants each year depends on the number of annual members, which now exceeds 300. 100% of grant donations go directly toward the grants pool, maximizing the number of local funding opportunities. In 2022, Impact100 Sonoma granted a record $335,500 for a cumulative total since 2010 of $3,324,500, making it one of the valley’s largest funders.

our impact

2023 Impetus Grants Model

The model of offering Impetus Grants of up to $25,000 to multiple valley nonprofits, initiated during the COVID-19 pandemic, will continue into 2023 and beyond. We're committed to supporting a broad range of organizations and serving residents of all ages and needs. Grant applications were submitted in January, and our Grant Review Committees are already hard at work selecting finalists to present to our members.

On April 29, we will award a record $337, 400 in Impetus Grants.

Want to learn more? We've answered our members' most frequently asked questions about the 2023 grants process.

Read Our 2023 Grants Q&A

Grant Recipients by Year


"Never doubt that a small group of thoughtful, committed citizens can change the world."  Margaret Mead

Sonoma Valley has a strong level of commitment, generosity and leadership, both from individuals and businesses. We honor and thank each one in our shared goal of ensuring a thriving Sonoma Valley.

100% of each Impact100 Sonoma member's annual donation ($1000) goes toward funding local grants. Our nonprofit organization is managed almost exclusively by volunteer members but, like all nonprofits, it does have operating expenses that must be met. This is where you come in!

We welcome and appreciate individual and business donations, large or small, to help offset our essential operating expenses.

Get Involved

Join a Grant Review Committee


Upcoming Events

Spotlight Series: Breast Cancer Breakthroughs

March 29, 2023 at 4:00 PM

Member+One Social at Three Sticks Winery

April 06, 2023 at 5:00 PM

Meet The Finalists

April 15, 2023 at 9:30 AM 

14th Annual Grant Awards Celebration

April 29, 2023 at 9:30 AM


Events Calendar


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

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