Home Postcode finder SA Petwood Petwood postcode SA Petwood is a locality in South Australia covered by postcode 5254. Postcode 5254 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Petwood business listing Be the first listing in Petwood Common questionsWhat is the postcode for Petwood?Petwood, SA has the postcode 5254.What state is Petwood in?Petwood is in South Australia (SA).Does postcode 5254 cover more than one suburb?Yes. Postcode 5254 covers 12 localities, so the postcode alone does not identify Petwood. Browse other postcodes in South Australia, or widen the search to every Australian postcode.