Home Postcode finder SA Waterfall Gully Waterfall Gully postcode SA Waterfall Gully is a locality in South Australia covered by postcode 5066. Postcode 5066 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Waterfall Gully business listing Be the first listing in Waterfall Gully Common questionsWhat is the postcode for Waterfall Gully?Waterfall Gully, SA has the postcode 5066.What state is Waterfall Gully in?Waterfall Gully is in South Australia (SA).Does postcode 5066 cover more than one suburb?Yes. Postcode 5066 covers 7 localities, so the postcode alone does not identify Waterfall Gully. Browse other postcodes in South Australia, or widen the search to every Australian postcode.