Home Postcode finder WA Kimbolton Kimbolton postcode WA Kimbolton is a locality in Western Australia covered by postcode 6728. Postcode 6728 State or territory Western Australia (WA) Region North West Suburbs Add a free Kimbolton business listing Be the first listing in Kimbolton Common questionsWhat is the postcode for Kimbolton?Kimbolton, WA has the postcode 6728.What state is Kimbolton in?Kimbolton is in Western Australia (WA).Does postcode 6728 cover more than one suburb?Yes. Postcode 6728 covers 8 localities, so the postcode alone does not identify Kimbolton. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.