Home Postcode finder SA Eight Mile Creek Eight Mile Creek postcode SA Eight Mile Creek 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 Eight Mile Creek business listing Be the first listing in Eight Mile Creek Common questionsWhat is the postcode for Eight Mile Creek?Eight Mile Creek, SA has the postcode 5291.What state is Eight Mile Creek in?Eight Mile Creek 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 Eight Mile Creek. Browse other postcodes in South Australia, or widen the search to every Australian postcode.