Home Postcodes by state NSW 2162 Postcode 2162 2162 is the postcode for 2 localities in NSW: Chester Hill and Sefton. Localities with postcode 2162Chester HillNSWSeftonNSW Postcode 2162 State or territory New South Wales (NSW) Localities 2 Council area Canterbury-Bankstown Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2161 · Postcode 2163