Home Postcode finder WA Ardath Ardath postcode WA Ardath is a locality in Western Australia covered by postcode 6419. Postcode 6419 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Ardath business listing Be the first listing in Ardath Common questionsWhat is the postcode for Ardath?Ardath, WA has the postcode 6419.What state is Ardath in?Ardath is in Western Australia (WA).Does postcode 6419 cover more than one suburb?No. Postcode 6419 covers Ardath only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.