Home Postcode finder QLD Silky Oak Silky Oak postcode QLD Silky Oak is a locality in Queensland covered by postcode 4854. Postcode 4854 State or territory Queensland (QLD) Region North QLD Add a free Silky Oak business listing Be the first listing in Silky Oak Common questionsWhat is the postcode for Silky Oak?Silky Oak, QLD has the postcode 4854.What state is Silky Oak in?Silky Oak is in Queensland (QLD).Does postcode 4854 cover more than one suburb?Yes. Postcode 4854 covers 25 localities, so the postcode alone does not identify Silky Oak. Browse other postcodes in Queensland, or widen the search to every Australian postcode.