Home Postcode finder QLD Borallon Borallon postcode QLD Borallon is a locality in Queensland covered by postcode 4306. Postcode 4306 State or territory Queensland (QLD) Region Western Suburbs Add a free Borallon business listing Be the first listing in Borallon Common questionsWhat is the postcode for Borallon?Borallon, QLD has the postcode 4306.What state is Borallon in?Borallon is in Queensland (QLD).Does postcode 4306 cover more than one suburb?Yes. Postcode 4306 covers 56 localities, so the postcode alone does not identify Borallon. Browse other postcodes in Queensland, or widen the search to every Australian postcode.