koonoona postcode sa Home ›› Postcode Finder ›› SA ›› Koonoona Koonoona local listingsThe suburb of Koonoona is located in SA and has a postcode of 5417. Free koonoona business listing! Get the first free listing in koonoona! Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.