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