Home Postcode finder WA Orchid Valley Orchid Valley postcode WA Orchid Valley is a locality in Western Australia covered by postcode 6394. Postcode 6394 State or territory Western Australia (WA) Region Wa Subs 2 Gsr Add a free Orchid Valley business listing Be the first listing in Orchid Valley Common questionsWhat is the postcode for Orchid Valley?Orchid Valley, WA has the postcode 6394.What state is Orchid Valley in?Orchid Valley is in Western Australia (WA).Does postcode 6394 cover more than one suburb?Yes. Postcode 6394 covers 8 localities, so the postcode alone does not identify Orchid Valley. Browse other postcodes in Western Australia, or widen the search to every Australian postcode.