Home Postcode finder WA Broadwood Broadwood postcode WA Broadwood 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 Broadwood business listing Be the first listing in Broadwood Common questionsWhat is the postcode for Broadwood?Broadwood, WA has the postcode 6430.What state is Broadwood in?Broadwood 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 Broadwood. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.