Home Postcode finder SA Mortana Mortana postcode SA Mortana is a locality in South Australia covered by postcode 5671. Postcode 5671 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Mortana business listing Be the first listing in Mortana Common questionsWhat is the postcode for Mortana?Mortana, SA has the postcode 5671.What state is Mortana in?Mortana is in South Australia (SA).Does postcode 5671 cover more than one suburb?Yes. Postcode 5671 covers 8 localities, so the postcode alone does not identify Mortana. Browse other postcodes in South Australia, or widen the search to every Australian postcode.