Home Postcode finder WA Mount Adams Mount Adams postcode WA Mount Adams is a locality in Western Australia covered by postcode 6525. Postcode 6525 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Mount Adams business listing Be the first listing in Mount Adams Common questionsWhat is the postcode for Mount Adams?Mount Adams, WA has the postcode 6525.What state is Mount Adams in?Mount Adams is in Western Australia (WA).Does postcode 6525 cover more than one suburb?Yes. Postcode 6525 covers 12 localities, so the postcode alone does not identify Mount Adams. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.