Washington, DC

ZIP code 20219 is a federal-use postal code in Southwest Washington, D.C., associated with the Office of the Comptroller of the Currency (OCC) headquarters at 400 Seventh Street SW. The address is in the L’Enfant Plaza area, near the National Mall, L’Enfant Plaza station, and Smithsonian museums such as the National Air and Space Museum and Hirshhorn Museum. It is not a conventional residential ZIP code.