walla-walla postcode nswst Home ›› Postcode Finder ›› NSWST ›› Walla-Walla Walla Walla local listingsThe suburb of Walla Walla is located in NSW and has a postcode of 2659. Free walla walla business listing! Get the first free listing in walla walla! Search and find other Postcodes in New South Wales or widen the search to Postcodes in Australia.