chiswick postcode nswdl Home ›› Postcode Finder ›› NSWDL ›› Chiswick Chiswick local listingsThe suburb of Chiswick is located in NSW and has a postcode of 2046. Free chiswick business listing! Get the first free listing in chiswick! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.