Home Postcode finder WA Lake Margarette Lake Margarette postcode WA Lake Margarette is a locality in Western Australia covered by postcode 6475. Postcode 6475 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Lake Margarette business listing Be the first listing in Lake Margarette Common questionsWhat is the postcode for Lake Margarette?Lake Margarette, WA has the postcode 6475.What state is Lake Margarette in?Lake Margarette is in Western Australia (WA).Does postcode 6475 cover more than one suburb?Yes. Postcode 6475 covers 7 localities, so the postcode alone does not identify Lake Margarette. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.