Home Postcode finder WA Lake Toolbrunup Lake Toolbrunup postcode WA Lake Toolbrunup is a locality in Western Australia covered by postcode 6320. Postcode 6320 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Lake Toolbrunup business listing Be the first listing in Lake Toolbrunup Common questionsWhat is the postcode for Lake Toolbrunup?Lake Toolbrunup, WA has the postcode 6320.What state is Lake Toolbrunup in?Lake Toolbrunup is in Western Australia (WA).Does postcode 6320 cover more than one suburb?Yes. Postcode 6320 covers 7 localities, so the postcode alone does not identify Lake Toolbrunup. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.