Home Postcode finder SA Hamley Hamley postcode SA Hamley is a locality in South Australia covered by postcode 5558. Postcode 5558 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hamley business listing Be the first listing in Hamley Common questionsWhat is the postcode for Hamley?Hamley, SA has the postcode 5558.What state is Hamley in?Hamley is in South Australia (SA).Does postcode 5558 cover more than one suburb?Yes. Postcode 5558 covers 14 localities, so the postcode alone does not identify Hamley. Browse other postcodes in South Australia, or widen the search to every Australian postcode.