Home Postcode finder WA Gutha Gutha postcode WA Gutha is a locality in Western Australia covered by postcode 6623. Postcode 6623 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Gutha business listing Be the first listing in Gutha Common questionsWhat is the postcode for Gutha?Gutha, WA has the postcode 6623.What state is Gutha in?Gutha is in Western Australia (WA).Does postcode 6623 cover more than one suburb?Yes. Postcode 6623 covers 6 localities, so the postcode alone does not identify Gutha. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.