Home Postcode finder QLD Osborne Osborne postcode QLD Osborne is a locality in Queensland covered by postcode 4806. Postcode 4806 State or territory Queensland (QLD) Region North QLD Add a free Osborne business listing Be the first listing in Osborne Common questionsWhat is the postcode for Osborne?Osborne, QLD has the postcode 4806.What state is Osborne in?Osborne is in Queensland (QLD).Does postcode 4806 cover more than one suburb?Yes. Postcode 4806 covers 9 localities, so the postcode alone does not identify Osborne. Browse other postcodes in Queensland, or widen the search to every Australian postcode.