Home Postcode finder QLD Millbank Millbank postcode QLD Millbank is a locality in Queensland covered by postcode 4670. Postcode 4670 State or territory Queensland (QLD) Region Sunshine Coast Add a free Millbank business listing Be the first listing in Millbank Common questionsWhat is the postcode for Millbank?Millbank, QLD has the postcode 4670.What state is Millbank in?Millbank is in Queensland (QLD).Does postcode 4670 cover more than one suburb?Yes. Postcode 4670 covers 52 localities, so the postcode alone does not identify Millbank. Browse other postcodes in Queensland, or widen the search to every Australian postcode.