Home Postcode finder SA Coomunga Coomunga postcode SA Coomunga is a locality in South Australia covered by postcode 5607. Postcode 5607 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Coomunga business listing Be the first listing in Coomunga Common questionsWhat is the postcode for Coomunga?Coomunga, SA has the postcode 5607.What state is Coomunga in?Coomunga is in South Australia (SA).Does postcode 5607 cover more than one suburb?Yes. Postcode 5607 covers 50 localities, so the postcode alone does not identify Coomunga. Browse other postcodes in South Australia, or widen the search to every Australian postcode.