Home Postcode finder SA Boors Plain Boors Plain postcode SA Boors Plain is a locality in South Australia covered by postcode 5554. Postcode 5554 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Boors Plain business listing Be the first listing in Boors Plain Common questionsWhat is the postcode for Boors Plain?Boors Plain, SA has the postcode 5554.What state is Boors Plain in?Boors Plain is in South Australia (SA).Does postcode 5554 cover more than one suburb?Yes. Postcode 5554 covers 10 localities, so the postcode alone does not identify Boors Plain. Browse other postcodes in South Australia, or widen the search to every Australian postcode.