Home Postcode finder SA Merty Merty Merty Merty postcode SA Merty Merty is a locality in South Australia covered by postcode 5731. Postcode 5731 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Merty Merty business listing Be the first listing in Merty Merty Common questionsWhat is the postcode for Merty Merty?Merty Merty, SA has the postcode 5731.What state is Merty Merty in?Merty Merty is in South Australia (SA).Does postcode 5731 cover more than one suburb?Yes. Postcode 5731 covers 9 localities, so the postcode alone does not identify Merty Merty. Browse other postcodes in South Australia, or widen the search to every Australian postcode.