Home Postcode finder SA Murbko Murbko postcode SA Murbko is a locality in South Australia covered by postcode 5320. Postcode 5320 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Murbko business listing Be the first listing in Murbko Common questionsWhat is the postcode for Murbko?Murbko, SA has the postcode 5320.What state is Murbko in?Murbko is in South Australia (SA).Does postcode 5320 cover more than one suburb?Yes. Postcode 5320 covers 13 localities, so the postcode alone does not identify Murbko. Browse other postcodes in South Australia, or widen the search to every Australian postcode.