Home Postcode finder NSWDL South Maitland South Maitland postcode NSWDL South Maitland is a locality in New South Wales covered by postcode 2320. Postcode 2320 State or territory New South Wales (NSWDL) Region Hunter Add a free South Maitland business listing Be the first listing in South Maitland Common questionsWhat is the postcode for South Maitland?South Maitland, NSWDL has the postcode 2320.What state is South Maitland in?South Maitland is in New South Wales (NSWDL).Does postcode 2320 cover more than one suburb?Yes. Postcode 2320 covers 30 localities, so the postcode alone does not identify South Maitland. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.