Home Postcodes by state SA 5142 Postcode 5142 5142 is the postcode for Uraidla, SA. Localities with postcode 5142UraidlaSA Postcode 5142 State or territory South Australia (SA) Localities 1 Council area Adelaide Hills Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 5141 · Postcode 5144