Home Postcode finder SA Hoyleton Hoyleton postcode SA Hoyleton is a locality in South Australia covered by postcode 5453. Postcode 5453 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hoyleton business listing Be the first listing in Hoyleton Common questionsWhat is the postcode for Hoyleton?Hoyleton, SA has the postcode 5453.What state is Hoyleton in?Hoyleton is in South Australia (SA).Does postcode 5453 cover more than one suburb?Yes. Postcode 5453 covers 16 localities, so the postcode alone does not identify Hoyleton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.