Home Postcode finder SA Hay Valley Hay Valley postcode SA Hay Valley is a locality in South Australia covered by postcode 5252. Postcode 5252 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Hay Valley business listing More business listings in Hay Valley Businesses in Hay ValleyBlack Stump Removal Adelaide Hills419 Nairne Road, Hay Valley South Australia 5252, Australia · 0411854561 Common questionsWhat is the postcode for Hay Valley?Hay Valley, SA has the postcode 5252.What state is Hay Valley in?Hay Valley is in South Australia (SA).Does postcode 5252 cover more than one suburb?Yes. Postcode 5252 covers 6 localities, so the postcode alone does not identify Hay Valley. Browse other postcodes in South Australia, or widen the search to every Australian postcode.