Home Postcode finder WA West Kalgoorlie West Kalgoorlie postcode WA West Kalgoorlie is a locality in Western Australia covered by postcode 6430. Postcode 6430 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free West Kalgoorlie business listing Be the first listing in West Kalgoorlie Common questionsWhat is the postcode for West Kalgoorlie?West Kalgoorlie, WA has the postcode 6430.What state is West Kalgoorlie in?West Kalgoorlie is in Western Australia (WA).Does postcode 6430 cover more than one suburb?Yes. Postcode 6430 covers 14 localities, so the postcode alone does not identify West Kalgoorlie. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.