Home Postcode finder SA Horsnell Gully Horsnell Gully postcode SA Horsnell Gully is a locality in South Australia covered by postcode 5141. Postcode 5141 State or territory South Australia (SA) Region Sa Subs Near 2 Add a free Horsnell Gully business listing Be the first listing in Horsnell Gully Common questionsWhat is the postcode for Horsnell Gully?Horsnell Gully, SA has the postcode 5141.What state is Horsnell Gully in?Horsnell Gully is in South Australia (SA).Does postcode 5141 cover more than one suburb?Yes. Postcode 5141 covers 2 localities, so the postcode alone does not identify Horsnell Gully. Browse other postcodes in South Australia, or widen the search to every Australian postcode.