Home Postcode finder WA Merkanooka Merkanooka postcode WA Merkanooka is a locality in Western Australia covered by postcode 6625. Postcode 6625 State or territory Western Australia (WA) Region Wa Subs 4 Coast Add a free Merkanooka business listing Be the first listing in Merkanooka Common questionsWhat is the postcode for Merkanooka?Merkanooka, WA has the postcode 6625.What state is Merkanooka in?Merkanooka is in Western Australia (WA).Does postcode 6625 cover more than one suburb?No. Postcode 6625 covers Merkanooka only, which is unusual - most Australian postcodes cover several localities. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.