Washington, DC

ZIP code 20405 is located in the heart of Washington, D.C. It is primarily known for being the official address of the United States Capitol Building and the surrounding congressional offices. The area is bustling with political activity and historical significance, as it is home to landmark attractions such as the Library of Congress, the Supreme Court, and the National Mall. With its iconic buildings and rich history, ZIP code 20405 is a hub of American government and culture.