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  1. Postal address. Wikimedia Foundation, Inc. 1 Montgomery Street Suite 1600 San Francisco, California 94104 USA Phone: +1-415-839-6885 Fax: +1-415-882-0495. Please do not send legal documents to this address, for Legal Service of Process, see below. Please note: We receive a large number of calls, so email or fax is always a better first option.

  2. The Wikimedia Foundation, Inc is a nonprofit charitable organization dedicated to encouraging the growth, development and distribution of free, multilingual content, and to providing the full content of these wiki-based projects to the public free of charge. Careers. Contact. Projects.

  3. Wikimedia Foundation, 1 Montgomery St., Suite 1600, San Francisco, CA 94104 U.S.A.

  4. Nov 23, 2023 · Some employers in the United States and Canada offer an easy and convenient way to give to the Wikimedia Foundation through a payroll deduction. Please check with your organization for availability and send any necessary paperwork to: Wikimedia Foundation, Inc. P.O. Box 98204 Washington, DC 20090-8204 USA. Combined Federal Campaign

  5. Aug 17, 2023 · The Wikimedia Foundation's headquarters is located on the 16th floor of One Montgomery Tower in San Francisco in California within the United States. The building is near two other locations in San Francisco that the Foundation previously used as its headquarters.

  6. The Wikimedia Foundation, Inc. (WMF) is an American 501(c)(3) nonprofit organization headquartered in San Francisco, California, and registered as a charitable foundation under local laws. It is best known as the host platform for Wikipedia, the largest crowdsourced online encyclopedia in the world.

  7. Contact Would you like to get in touch with us about Wikimedia’s education initiatives, partnership opportunities, or project ideas? Please contact To learn more about our volunteer activities and how to get involved, visit Wikimedia Outreach. Continue reading → Help us unlock the world’s knowledge.

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