General inquiries

The William and Flora Hewlett Foundation
2121 Sand Hill Road
Menlo Park, CA 94025

(650) 234-4500


Grant inquiries

Please see individual program pages, our grants database, as well as grantmaking FAQ.

Media inquiries

Please see the Newsroom for individual media contacts to ensure timely replies.

Our office building

The foundation is committed to helping our community and offers meeting spaces free of charge on first-come, first-served basis to nonprofit organizations. Note: We do not permit the space to to be used for fundraising or political events.

Built in 2002, our building was the first in California and the fifth in the country to receive a gold-level certification under the U.S. Green Building Council’s LEED (Leadership in Energy and Environmental Design) rating system.

Grantee feedback

Grantees are welcome to provide comments directly to program staff or by emailing about any aspect of our grantmaking process. Grantees can also submit comments anonymously through a third-party website. Responses are collected and relayed back to the foundation without any identifying information.

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