Capitol Heights, MD

ZIP code 20791 belongs to Naval Air Station Patuxent River in Maryland. This military installation houses the U.S. Naval Test Pilot School, the Air Test and Evaluation Squadron One (VX-1), and the Naval Air Systems Command (NAVAIR). Situated along the Patuxent River, the base is a key hub for naval aviation research, development, testing, and evaluation, playing a vital role in the advancement of U.S. military aircraft technology.