Home Postcode finder SA Bool Lagoon Bool Lagoon postcode SA Bool Lagoon is a locality in South Australia covered by postcode 5271. Postcode 5271 State or territory South Australia (SA) Region SA Outer Suburbs Add a free Bool Lagoon business listing Be the first listing in Bool Lagoon Common questionsWhat is the postcode for Bool Lagoon?Bool Lagoon, SA has the postcode 5271.What state is Bool Lagoon in?Bool Lagoon is in South Australia (SA).Does postcode 5271 cover more than one suburb?Yes. Postcode 5271 covers 18 localities, so the postcode alone does not identify Bool Lagoon. Browse other postcodes in South Australia, or widen the search to every Australian postcode.