Home Postcode finder SA Yorke Valley Yorke Valley postcode SA Yorke Valley is a locality in South Australia covered by postcode 5573. Postcode 5573 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Yorke Valley business listing Be the first listing in Yorke Valley Common questionsWhat is the postcode for Yorke Valley?Yorke Valley, SA has the postcode 5573.What state is Yorke Valley in?Yorke Valley is in South Australia (SA).Does postcode 5573 cover more than one suburb?Yes. Postcode 5573 covers 10 localities, so the postcode alone does not identify Yorke Valley. Browse other postcodes in South Australia, or widen the search to every Australian postcode.