Home Postcode finder QLD Mount Coolon Mount Coolon postcode QLD Mount Coolon is a locality in Queensland covered by postcode 4804. Postcode 4804 State or territory Queensland (QLD) Region North QLD Add a free Mount Coolon business listing Be the first listing in Mount Coolon Common questionsWhat is the postcode for Mount Coolon?Mount Coolon, QLD has the postcode 4804.What state is Mount Coolon in?Mount Coolon is in Queensland (QLD).Does postcode 4804 cover more than one suburb?Yes. Postcode 4804 covers 5 localities, so the postcode alone does not identify Mount Coolon. Browse other postcodes in Queensland, or widen the search to every Australian postcode.