Home Postcode finder SA Blackfellows Caves Blackfellows Caves postcode SA Blackfellows Caves is a locality in South Australia covered by postcode 5291. Postcode 5291 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Blackfellows Caves business listing Be the first listing in Blackfellows Caves Common questionsWhat is the postcode for Blackfellows Caves?Blackfellows Caves, SA has the postcode 5291.What state is Blackfellows Caves in?Blackfellows Caves is in South Australia (SA).Does postcode 5291 cover more than one suburb?Yes. Postcode 5291 covers 34 localities, so the postcode alone does not identify Blackfellows Caves. Browse other postcodes in South Australia, or widen the search to every Australian postcode.