Washington, DC

ZIP code 20404 encompasses the iconic area of the United States Capitol in Washington, D.C. This area is home to notable landmarks such as the U.S. Capitol Building, where the U.S. Congress convenes, and the Supreme Court of the United States. The Library of Congress, a massive repository of knowledge, and the Folger Shakespeare Library, dedicated to the famous playwright, are also found within this ZIP code, making it a hub of history and culture.