Home Postcode finder SA Olympic Dam Olympic Dam postcode SA Olympic Dam is a locality in South Australia covered by postcode 5725. Postcode 5725 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Olympic Dam business listing Be the first listing in Olympic Dam Common questionsWhat is the postcode for Olympic Dam?Olympic Dam, SA has the postcode 5725.What state is Olympic Dam in?Olympic Dam is in South Australia (SA).Does postcode 5725 cover more than one suburb?Yes. Postcode 5725 covers 2 localities, so the postcode alone does not identify Olympic Dam. Browse other postcodes in South Australia, or widen the search to every Australian postcode.