Home Postcodes by state SA 5088 Postcode 5088 5088 is the postcode for Holden Hill, SA. Postcode 5088 State or territory South Australia (SA) Localities 1 Council area Mainly Tea Tree Gully, partly Port Adelaide Enfield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Localities with postcode 5088Holden HillSA Browse postcodes in order← 5087 Klemzig · 5089 Highbury →