Home Postcode finder SA Croydon Croydon postcode SA Croydon is a locality in South Australia covered by postcode 5008. Postcode 5008 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Croydon business listing Be the first listing in Croydon Common questionsWhat is the postcode for Croydon?Croydon, SA has the postcode 5008.What state is Croydon in?Croydon is in South Australia (SA).Does postcode 5008 cover more than one suburb?Yes. Postcode 5008 covers 8 localities, so the postcode alone does not identify Croydon. Browse other postcodes in South Australia, or widen the search to every Australian postcode.