Long Beach, CA

ZIP code 90831 is a unique post office box-only code located in Long Beach, California. It primarily serves the Long Beach Naval Shipyard and the Long Beach Convention Center, both significant landmarks in the area. The Naval Shipyard has a rich maritime history and the Convention Center hosts a variety of events, including conventions, concerts, and trade shows, making ZIP code 90831 an important hub for both business and entertainment in Long Beach.