Official Wikimedia DC website:
Wikimedia District of Columbia is the second official Wikimedia chapter organized within the United States, covering the national capital region including the District of Columbia and the states of Delaware, Maryland, Virginia, and West Virginia. Wikimedia DC was incorporated in the District of Columbia as the Wiki Society of Washington, DC Inc. on May 7, 2011, and was recognized as a chapter on September 12, 2011. The chapter's stated aims are the advancement of general knowledge, the collection and development of educational content under a free license or in the public domain, and the dissemination of it effectively and globally.
Wikimedia DC is uniquely situated to support the Wikimedia movement. Being located in the capital region of the United States, the chapter engages in free content promotion, outreach, and partnership efforts with a variety of cultural institutions and government agencies, many of which either have large amounts of public domain content already available or are willing to release content under a free license.