Home Postcode finder WA Plumridge Lakes Plumridge Lakes postcode WA Plumridge Lakes is a locality in Western Australia covered by postcode 6431. Postcode 6431 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Plumridge Lakes business listing Be the first listing in Plumridge Lakes Common questionsWhat is the postcode for Plumridge Lakes?Plumridge Lakes, WA has the postcode 6431.What state is Plumridge Lakes in?Plumridge Lakes is in Western Australia (WA).Does postcode 6431 cover more than one suburb?Yes. Postcode 6431 covers 13 localities, so the postcode alone does not identify Plumridge Lakes. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.