Home Postcode finder WA Lake King Lake King postcode WA Lake King 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 Lake King business listing More business listings in Lake King Businesses in Lake KingLake King Primary SchoolRavensthorpe/Newdegate Rd · 08 98744018 Common questionsWhat is the postcode for Lake King?Lake King, WA has the postcode 6356.What state is Lake King in?Lake King 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 Lake King. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.