Home Postcode finder WA Hay Hay postcode WA Hay is a locality in Western Australia covered by postcode 6333. Postcode 6333 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Hay business listing More business listings in Hay Businesses in HaySouthern Ceiling RepairsSea Change Close, Hay WA 6333, Australia · 0433653333 Common questionsWhat is the postcode for Hay?Hay, WA has the postcode 6333.What state is Hay in?Hay is in Western Australia (WA).Does postcode 6333 cover more than one suburb?Yes. Postcode 6333 covers 17 localities, so the postcode alone does not identify Hay. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.