Home Postcodes by state SA 5602 Postcode 5602 5602 is the postcode for 8 localities in SA: Cowell, Lucky Bay, Mangalo, Midgee, Miltalie, Minbrie and 2 more. Localities with postcode 5602CowellSALucky BaySAMangaloSAMidgeeSAMiltalieSAMinbrieSAMitchellvilleSAPort GibbonSA Postcode 5602 State or territory South Australia (SA) Localities 8 Council area Franklin Harbour; Cleve Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5601 · Postcode 5603