Home Postcode finder WA Goomarin Goomarin postcode WA Goomarin is a locality in Western Australia covered by postcode 6415. Postcode 6415 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Goomarin business listing Be the first listing in Goomarin Common questionsWhat is the postcode for Goomarin?Goomarin, WA has the postcode 6415.What state is Goomarin in?Goomarin is in Western Australia (WA).Does postcode 6415 cover more than one suburb?Yes. Postcode 6415 covers 6 localities, so the postcode alone does not identify Goomarin. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.