Home Postcode finder SA Ridleyton Ridleyton postcode SA Ridleyton 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 Ridleyton business listing Be the first listing in Ridleyton Common questionsWhat is the postcode for Ridleyton?Ridleyton, SA has the postcode 5008.What state is Ridleyton in?Ridleyton 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 Ridleyton. Browse other postcodes in South Australia, or widen the search to every Australian postcode.