Washington, DC

ZIP code 20380 is a specialized federal-use postal code in Washington, D.C., not a conventional neighborhood code with clearly defined residential boundaries. The surrounding southwest waterfront area is notable for federal and military facilities, including the U.S. Naval Research Laboratory and Joint Base Anacostia–Bolling, as well as Anacostia Park. These landmarks are in the broader area; federal ZIP codes do not always align neatly with mapped boundaries.