Home Postcode finder WA Hatter Hill Hatter Hill postcode WA Hatter Hill is a locality in Western Australia covered by postcode 6356. Postcode 6356 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Hatter Hill business listing Be the first listing in Hatter Hill Common questionsWhat is the postcode for Hatter Hill?Hatter Hill, WA has the postcode 6356.What state is Hatter Hill in?Hatter Hill is in Western Australia (WA).Does postcode 6356 cover more than one suburb?Yes. Postcode 6356 covers 3 localities, so the postcode alone does not identify Hatter Hill. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.