Home Postcode finder WA Lake Brown Lake Brown postcode WA Lake Brown is a locality in Western Australia covered by postcode 6479. Postcode 6479 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Lake Brown business listing Be the first listing in Lake Brown Common questionsWhat is the postcode for Lake Brown?Lake Brown, WA has the postcode 6479.What state is Lake Brown in?Lake Brown is in Western Australia (WA).Does postcode 6479 cover more than one suburb?Yes. Postcode 6479 covers 9 localities, so the postcode alone does not identify Lake Brown. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.