Home Postcode finder SA Yantanabie Yantanabie postcode SA Yantanabie is a locality in South Australia covered by postcode 5661. Postcode 5661 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Yantanabie business listing Be the first listing in Yantanabie Common questionsWhat is the postcode for Yantanabie?Yantanabie, SA has the postcode 5661.What state is Yantanabie in?Yantanabie is in South Australia (SA).Does postcode 5661 cover more than one suburb?Yes. Postcode 5661 covers 5 localities, so the postcode alone does not identify Yantanabie. Browse other postcodes in South Australia, or widen the search to every Australian postcode.