south-maitland postcode nswst Home ›› Postcode Finder ›› NSWST ›› South-Maitland South Maitland local listingsThe suburb of South Maitland is located in NSW and has a postcode of 2320. Free south maitland business listing! Get the first free listing in south maitland! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.