Home Postcodes by state SA 5510 Postcode 5510 5510 is the postcode for Lochiel, SA. Localities with postcode 5510LochielSA Postcode 5510 State or territory South Australia (SA) Localities 1 Council area Wakefield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5502 · Postcode 5520