Home Postcode finder QLD Mount Coot-Tha Mount Coot-Tha postcode QLD Mount Coot-Tha is a locality in Queensland covered by postcode 4066. Postcode 4066 State or territory Queensland (QLD) Region Northgate Add a free Mount Coot-Tha business listing Be the first listing in Mount Coot-Tha Common questionsWhat is the postcode for Mount Coot-Tha?Mount Coot-Tha, QLD has the postcode 4066.What state is Mount Coot-Tha in?Mount Coot-Tha is in Queensland (QLD).Does postcode 4066 cover more than one suburb?Yes. Postcode 4066 covers 3 localities, so the postcode alone does not identify Mount Coot-Tha. Browse other postcodes in Queensland, or widen the search to every Australian postcode.