Electronic Privacy Information Center (EPIC) — Headquarters: Washington, DC

Note: The provided excerpt from the 'About Us' page discusses EPIC's mission, beliefs, projects, and organizational structure, but does not include any information about the organization's physical headquarters location. While the source URL is from epic.org and the claim references this same URL, the specific excerpt provided does not address the headquarters claim. To verify this claim, one would need to find a different section of the website (such as a 'Contact Us' page) or other source material that explicitly states the headquarters location.