Home Postcode finder WA Walmsley Walmsley postcode WA Walmsley is a locality in Western Australia covered by postcode 6330. Postcode 6330 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Walmsley business listing Be the first listing in Walmsley Common questionsWhat is the postcode for Walmsley?Walmsley, WA has the postcode 6330.What state is Walmsley in?Walmsley is in Western Australia (WA).Does postcode 6330 cover more than one suburb?Yes. Postcode 6330 covers 50 localities, so the postcode alone does not identify Walmsley. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.