Home Postcode finder QLD O'Briens Hill O'Briens Hill postcode QLD O'Briens Hill is a locality in Queensland covered by postcode 4860. Postcode 4860 State or territory Queensland (QLD) Region North QLD Add a free O'Briens Hill business listing Be the first listing in O'Briens Hill Common questionsWhat is the postcode for O'Briens Hill?O'Briens Hill, QLD has the postcode 4860.What state is O'Briens Hill in?O'Briens Hill is in Queensland (QLD).Does postcode 4860 cover more than one suburb?Yes. Postcode 4860 covers 37 localities, so the postcode alone does not identify O'Briens Hill. Browse other postcodes in Queensland, or widen the search to every Australian postcode.