Home Postcode finder SA Wirrulla Wirrulla postcode SA Wirrulla is a locality in South Australia covered by postcode 5661. Postcode 5661 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Wirrulla business listing Be the first listing in Wirrulla Common questionsWhat is the postcode for Wirrulla?Wirrulla, SA has the postcode 5661.What state is Wirrulla in?Wirrulla is in South Australia (SA).Does postcode 5661 cover more than one suburb?Yes. Postcode 5661 covers 5 localities, so the postcode alone does not identify Wirrulla. Browse other postcodes in South Australia, or widen the search to every Australian postcode.