Home Postcode finder SA O'Halloran Hill O'Halloran Hill postcode SA O'Halloran Hill is a locality in South Australia covered by postcode 5158. Postcode 5158 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free O'Halloran Hill business listing More business listings in O'Halloran Hill Businesses in O'Halloran HillPets Health O'halloran Hill Vet Centre123 Main S Rd · +61 8 8381 2300 Common questionsWhat is the postcode for O'Halloran Hill?O'Halloran Hill, SA has the postcode 5158.What state is O'Halloran Hill in?O'Halloran Hill is in South Australia (SA).Does postcode 5158 cover more than one suburb?Yes. Postcode 5158 covers 4 localities, so the postcode alone does not identify O'Halloran Hill. Browse other postcodes in South Australia, or widen the search to every Australian postcode.