Home Postcodes by state WA Forrest Forrest postcode WA Forrest is a locality in Western Australia covered by postcode 6434. Postcode 6434 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Council area Kalgoorlie-Boulder Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Add a free Forrest business listing Be the first listing in Forrest Also in postcode 6434CundeeleeWA 6434ParkestonWA 6434RawlinnaWA 6434ZanthusWA 6434 Other places called ForrestForrestACT 2603ForrestVIC 3236 Common questionsWhat is the postcode for Forrest?Forrest, WA has the postcode 6434.What state is Forrest in?Forrest is in Western Australia (WA).What council is Forrest in?Forrest is in the Kalgoorlie-Boulder local government area.Does postcode 6434 cover more than one suburb?Yes. Postcode 6434 covers 5 localities, so the postcode alone does not identify Forrest. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.