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! 1MC Property Plus1 Clark Terrace, Seaton SA 5023, Australia 0404 431 7802JML DecoratingSeaton South Australia 5023, Australia 04518558003Enviro 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.