Home Postcode finder SA Hampden Hampden postcode SA Hampden is a locality in South Australia covered by postcode 5374. Postcode 5374 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Hampden business listing Be the first listing in Hampden Common questionsWhat is the postcode for Hampden?Hampden, SA has the postcode 5374.What state is Hampden in?Hampden is in South Australia (SA).Does postcode 5374 cover more than one suburb?Yes. Postcode 5374 covers 15 localities, so the postcode alone does not identify Hampden. Browse other postcodes in South Australia, or widen the search to every Australian postcode.