Home Postcode finder SA Spence Spence postcode SA Spence is a locality in South Australia covered by postcode 5271. Postcode 5271 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Spence business listing Be the first listing in Spence Common questionsWhat is the postcode for Spence?Spence, SA has the postcode 5271.What state is Spence in?Spence is in South Australia (SA).Does postcode 5271 cover more than one suburb?Yes. Postcode 5271 covers 18 localities, so the postcode alone does not identify Spence. Browse other postcodes in South Australia, or widen the search to every Australian postcode.