Home Postcode finder SA Wallala Wallala postcode SA Wallala 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 Wallala business listing Be the first listing in Wallala Common questionsWhat is the postcode for Wallala?Wallala, SA has the postcode 5661.What state is Wallala in?Wallala 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 Wallala. Browse other postcodes in South Australia, or widen the search to every Australian postcode.