Home Postcode finder SA False Bay False Bay postcode SA False Bay is a locality in South Australia covered by postcode 5600. Postcode 5600 State or territory South Australia (SA) Region SA Outer Suburbs Add a free False Bay business listing Be the first listing in False Bay Common questionsWhat is the postcode for False Bay?False Bay, SA has the postcode 5600.What state is False Bay in?False Bay is in South Australia (SA).Does postcode 5600 cover more than one suburb?Yes. Postcode 5600 covers 13 localities, so the postcode alone does not identify False Bay. Browse other postcodes in South Australia, or widen the search to every Australian postcode.