new-lambton postcode nswst Home ›› Postcode Finder ›› NSWST ›› New-Lambton New Lambton local listingsThe suburb of New Lambton is located in NSW and has a postcode of 2305. Free new lambton business listing! Get the first free listing in new lambton! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.