Home Postcodes by state SA 5576 Postcode 5576 5576 is the postcode for 3 localities in SA: Honiton, Port Moorowie and Yorketown. Localities with postcode 5576HonitonSAPort MoorowieSAYorketownSA Postcode 5576 State or territory South Australia (SA) Localities 3 Council area Yorke Peninsula Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5575 · Postcode 5577