Home Postcode finder SA Parnaroo Parnaroo postcode SA Parnaroo is a locality in South Australia covered by postcode 5422. Postcode 5422 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Parnaroo business listing Be the first listing in Parnaroo Common questionsWhat is the postcode for Parnaroo?Parnaroo, SA has the postcode 5422.What state is Parnaroo in?Parnaroo is in South Australia (SA).Does postcode 5422 cover more than one suburb?Yes. Postcode 5422 covers 13 localities, so the postcode alone does not identify Parnaroo. Browse other postcodes in South Australia, or widen the search to every Australian postcode.