Home Postcode finder WA Marvel Loch Marvel Loch postcode WA Marvel Loch is a locality in Western Australia covered by postcode 6426. Postcode 6426 State or territory Western Australia (WA) Region Wa Subs 1 G Flds Add a free Marvel Loch business listing Be the first listing in Marvel Loch Common questionsWhat is the postcode for Marvel Loch?Marvel Loch, WA has the postcode 6426.What state is Marvel Loch in?Marvel Loch is in Western Australia (WA).Does postcode 6426 cover more than one suburb?Yes. Postcode 6426 covers 14 localities, so the postcode alone does not identify Marvel Loch. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.