Home Postcode finder SA Hilton Plaza Hilton Plaza postcode SA Hilton Plaza is a locality in South Australia covered by postcode 5033. Postcode 5033 State or territory South Australia (SA) Region Adelaide Add a free Hilton Plaza business listing Be the first listing in Hilton Plaza Common questionsWhat is the postcode for Hilton Plaza?Hilton Plaza, SA has the postcode 5033.What state is Hilton Plaza in?Hilton Plaza is in South Australia (SA).Does postcode 5033 cover more than one suburb?Yes. Postcode 5033 covers 6 localities, so the postcode alone does not identify Hilton Plaza. Browse other postcodes in South Australia, or widen the search to every Australian postcode.