Home Postcode finder SA Watchman Watchman postcode SA Watchman is a locality in South Australia covered by postcode 5461. Postcode 5461 State or territory South Australia (SA) Region Sa Subs Near 1 Add a free Watchman business listing Be the first listing in Watchman Common questionsWhat is the postcode for Watchman?Watchman, SA has the postcode 5461.What state is Watchman in?Watchman is in South Australia (SA).Does postcode 5461 cover more than one suburb?Yes. Postcode 5461 covers 13 localities, so the postcode alone does not identify Watchman. Browse other postcodes in South Australia, or widen the search to every Australian postcode.