Home Postcode finder WA Koongamia Koongamia postcode WA Koongamia is a locality in Western Australia covered by postcode 6056. Postcode 6056 State or territory Western Australia (WA) Region North West Suburbs Add a free Koongamia business listing Be the first listing in Koongamia Common questionsWhat is the postcode for Koongamia?Koongamia, WA has the postcode 6056.What state is Koongamia in?Koongamia is in Western Australia (WA).Does postcode 6056 cover more than one suburb?Yes. Postcode 6056 covers 17 localities, so the postcode alone does not identify Koongamia. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.