seaton postcode sa Home ›› Postcode Finder ›› SA ›› Seaton Seaton local listingsThe suburb of Seaton is located in SA and has a postcode of 5023. Free seaton business listing! 1Seaton High SchoolGlenburnie St 08 844529442Seaton Park Primary School80 Balcombe Ave 08 835624223Enviro Roofing1 Clark Terrace 1300 85 05 04 View more business listings in seaton Search and find other Postcodes in South Australia or widen the search to Postcodes in Australia.