Washington, DC

ZIP code 20539 is a special-purpose Washington, D.C., postal code rather than a conventional neighborhood ZIP code, and it does not have a clearly defined public geographic footprint. For that reason, specific landmarks cannot be reliably identified as being within it. The U.S. Capitol, White House, National Mall, and Smithsonian museums are major central Washington landmarks, but should not be assumed to lie within ZIP code 20539.