Home Postcode finder SA Hart Hart postcode SA Hart is a locality in South Australia covered by postcode 5464. Postcode 5464 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hart business listing Be the first listing in Hart Common questionsWhat is the postcode for Hart?Hart, SA has the postcode 5464.What state is Hart in?Hart is in South Australia (SA).Does postcode 5464 cover more than one suburb?Yes. Postcode 5464 covers 8 localities, so the postcode alone does not identify Hart. Browse other postcodes in South Australia, or widen the search to every Australian postcode.