Home Postcodes by state NSW 2257 Postcode 2257 2257 is the postcode for 12 localities in NSW: Booker Bay, Box Head, Daleys Point, Empire Bay, Ettalong Beach, Hardys Bay and 6 more. Localities with postcode 2257Booker BayNSWBox HeadNSWDaleys PointNSWEmpire BayNSWEttalong BeachNSWHardys BayNSWKillcareNSWKillcare HeightsNSWPretty BeachNSWSt Huberts IslandNSWUmina BeachNSWWagstaffeNSW Postcode 2257 State or territory New South Wales (NSW) Localities 12 Council area Central Coast Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2256 · Postcode 2258