seddon postcode sa Home ›› Postcode Finder ›› SA ›› Seddon Seddon local listingsThe suburb of Seddon is located in SA and has a postcode of 5223. Free seddon business listing! 1Ecopia Retreat563B Gregors Road, Seddon SA, Australia 0414 751 733 View more business listings in seddon Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.