Home Postcode finder QLD Coolana Coolana postcode QLD Coolana is a locality in Queensland covered by postcode 4311. Postcode 4311 State or territory Queensland (QLD) Region Western Suburbs Add a free Coolana business listing Be the first listing in Coolana Common questionsWhat is the postcode for Coolana?Coolana, QLD has the postcode 4311.What state is Coolana in?Coolana is in Queensland (QLD).Does postcode 4311 cover more than one suburb?Yes. Postcode 4311 covers 17 localities, so the postcode alone does not identify Coolana. Browse other postcodes in Queensland, or widen the search to every Australian postcode.