In which U.S. city is the Wikimedia Foundation headquartered?

The Wikimedia Foundation is headquartered in San Francisco, California.

The foundation is the nonprofit organization that provides much of the legal, financial, and technical infrastructure for Wikipedia and related Wikimedia projects. It was incorporated in St. Petersburg, Florida, on June 20, 2003, but its headquarters later moved west.

In 2007, the foundation decided to relocate to the San Francisco Bay Area, citing access to technology organizations, potential partners, talent, and international travel. The move to San Francisco was completed by January 31, 2008. The foundation has since occupied several offices in the city, including locations in the Montgomery Street area.

The city can be confused with the broader Bay Area, which includes places such as Oakland and San Jose. The quiz asks for the headquarters city, so “San Francisco” is the precise answer. The foundation itself does not write Wikipedia’s articles; volunteer editors create and maintain the content, while the foundation supports the projects and operates key infrastructure.