Home Postcodes by state SA 5640 Postcode 5640 5640 is the postcode for 4 localities in SA: Campoona, Cleve, Jamieson and Waddikee. Localities with postcode 5640CampoonaSACleveSAJamiesonSAWaddikeeSA Postcode 5640 State or territory South Australia (SA) Localities 4 Council area Cleve; Mainly Cleve, partly Kimba Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5633 · Postcode 5641