Where is Zip Code 94028 map for 2020, 2019Primary Zip Codes for 94028Zip CodePrimary CitySecondary City94028Portola ValleyPortola Valley, Menlo Pk, Menlo Park, Portola VallyCities sharing Zip Codes with 94028Zip CodePrimary CitySecondary CityMore Information94027AthertonMenlo Park Menlo Park population stats 94028Portola ValleyMenlo Park Menlo Park population stats 94028Portola ValleyPortola Vally94028Portola ValleyMenlo Pk94025Menlo ParkMenlo Park Menlo Park population stats 94026Menlo ParkMenlo Park Menlo Park population stats Advertisements