Zip Code 94510 is located in the state of California in the San Francisco - Oakland - San Jose metro area. Zip code 94510 is primarily located in Solano County. The official US Postal Service name for 94510 is BENICIA, California. Portions of zip code 94510 are contained within or border the city limits of Benicia, CA, Vallejo, CA, and Martinez, CA. The area code for zip code 94510 is 707. 94510 can be classified socioeconically as a Middle Class class zipcode in comparison to other zipcodes in California.