allendale-north postcode sa Home ›› Postcode Finder ›› SA ›› Allendale-North Allendale North local listingsThe suburb of Allendale North is located in SA and has a postcode of 5373. Free allendale north business listing! Get the first free listing in allendale north! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.