Home Postcode finder WA Lake Jasper Lake Jasper postcode WA Lake Jasper is a locality in Western Australia covered by postcode 6260. Postcode 6260 State or territory Western Australia (WA) Region Wa Subs 3 Sth Rd Add a free Lake Jasper business listing Be the first listing in Lake Jasper Common questionsWhat is the postcode for Lake Jasper?Lake Jasper, WA has the postcode 6260.What state is Lake Jasper in?Lake Jasper is in Western Australia (WA).Does postcode 6260 cover more than one suburb?Yes. Postcode 6260 covers 10 localities, so the postcode alone does not identify Lake Jasper. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.