Home Postcode finder QLD Oak Valley Oak Valley postcode QLD Oak Valley is a locality in Queensland covered by postcode 4811. Postcode 4811 State or territory Queensland (QLD) Region North QLD Add a free Oak Valley business listing Be the first listing in Oak Valley Common questionsWhat is the postcode for Oak Valley?Oak Valley, QLD has the postcode 4811.What state is Oak Valley in?Oak Valley is in Queensland (QLD).Does postcode 4811 cover more than one suburb?Yes. Postcode 4811 covers 9 localities, so the postcode alone does not identify Oak Valley. Browse other postcodes in Queensland, or widen the search to every Australian postcode.