Home Postcode finder SA Cadell Cadell postcode SA Cadell is a locality in South Australia covered by postcode 5321. Postcode 5321 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Cadell business listing More business listings in Cadell Businesses in CadellCadell Primary SchoolWaikerie Road · 08 85403291 Common questionsWhat is the postcode for Cadell?Cadell, SA has the postcode 5321.What state is Cadell in?Cadell is in South Australia (SA).Does postcode 5321 cover more than one suburb?Yes. Postcode 5321 covers 2 localities, so the postcode alone does not identify Cadell. Browse other postcodes in South Australia, or widen the search to every Australian postcode.