Home Postcodes by state SA 5555 Postcode 5555 5555 is the postcode for 11 localities in SA: Alford, Collinsfield, Dowling, Dowlingville, Hope Gap, Kulpara and 5 more. Localities with postcode 5555AlfordSACollinsfieldSADowlingSADowlingvilleSAHope GapSAKulparaSALake ViewSAMeltonSAMundooraSATickeraSAWinultaSA Postcode 5555 State or territory South Australia (SA) Localities 11 Council area Barunga West; Port Pirie; Wakefield; Mainly Barunga West, partly Wakefield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5554 · Postcode 5556