Home Postcode finder SA St Georges St Georges postcode SA St Georges is a locality in South Australia covered by postcode 5064. Postcode 5064 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free St Georges business listing Be the first listing in St Georges Common questionsWhat is the postcode for St Georges?St Georges, SA has the postcode 5064.What state is St Georges in?St Georges is in South Australia (SA).Does postcode 5064 cover more than one suburb?Yes. Postcode 5064 covers 6 localities, so the postcode alone does not identify St Georges. Browse other postcodes in South Australia, or widen the search to every Australian postcode.