hawthorndene postcode sa Home ›› Postcode Finder ›› SA ›› Hawthorndene Hawthorndene local listingsThe suburb of Hawthorndene is located in SA and has a postcode of 5051. Free hawthorndene business listing! 1Hawthorndene Primary SchoolSuffolk Rd 08 82783551 View more business listings in hawthorndene Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.