middlingbank postcode nswst Home ›› Postcode Finder ›› NSWST ›› Middlingbank Middlingbank local listingsThe suburb of Middlingbank is located in NSW and has a postcode of 2630. Free middlingbank business listing! Get the first free listing in middlingbank! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.