Home Postcode finder WA Herdsman Herdsman postcode WA Herdsman is a locality in Western Australia covered by postcode 6017. Postcode 6017 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Herdsman business listing Be the first listing in Herdsman Common questionsWhat is the postcode for Herdsman?Herdsman, WA has the postcode 6017.What state is Herdsman in?Herdsman is in Western Australia (WA).Does postcode 6017 cover more than one suburb?Yes. Postcode 6017 covers 2 localities, so the postcode alone does not identify Herdsman. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.