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