Home Postcode finder SA Seppeltsfield Seppeltsfield postcode SA Seppeltsfield is a locality in South Australia covered by postcode 5355. Postcode 5355 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Seppeltsfield business listing Be the first listing in Seppeltsfield Common questionsWhat is the postcode for Seppeltsfield?Seppeltsfield, SA has the postcode 5355.What state is Seppeltsfield in?Seppeltsfield is in South Australia (SA).Does postcode 5355 cover more than one suburb?Yes. Postcode 5355 covers 8 localities, so the postcode alone does not identify Seppeltsfield. Browse other postcodes in South Australia, or widen the search to every Australian postcode.