Home Postcode finder WA Wongan Hills Wongan Hills postcode WA Wongan Hills is a locality in Western Australia covered by postcode 6603. Postcode 6603 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Wongan Hills business listing More business listings in Wongan Hills Businesses in Wongan HillsDSATCO Mulch8 Jensen St, Wongan Hills WA, Australia · 08 9671 1500Wongan Hills District High SchoolQuinlan St · 08 96711155 Common questionsWhat is the postcode for Wongan Hills?Wongan Hills, WA has the postcode 6603.What state is Wongan Hills in?Wongan Hills is in Western Australia (WA).Does postcode 6603 cover more than one suburb?Yes. Postcode 6603 covers 5 localities, so the postcode alone does not identify Wongan Hills. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.