Home Postcode finder SA Washpool Washpool postcode SA Washpool is a locality in South Australia covered by postcode 5454. Postcode 5454 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Washpool business listing Be the first listing in Washpool Common questionsWhat is the postcode for Washpool?Washpool, SA has the postcode 5454.What state is Washpool in?Washpool is in South Australia (SA).Does postcode 5454 cover more than one suburb?Yes. Postcode 5454 covers 7 localities, so the postcode alone does not identify Washpool. Browse other postcodes in South Australia, or widen the search to every Australian postcode.