Vallejo, CA

ZIP code 94591 is located in Vallejo, California. This area is home to Six Flags Discovery Kingdom, a popular theme park featuring rides and animal exhibits. The Mare Island Naval Shipyard, a historic site that was once a major U.S. Navy base, is also located within this zip code. Additionally, residents of 94591 have easy access to the Vallejo Ferry Terminal, providing transportation across the San Francisco Bay.