Home Postcode finder QLD Coochin Coochin postcode QLD Coochin is a locality in Queensland covered by postcode 4310. Postcode 4310 State or territory Queensland (QLD) Region Western Suburbs Add a free Coochin business listing Be the first listing in Coochin Common questionsWhat is the postcode for Coochin?Coochin, QLD has the postcode 4310.What state is Coochin in?Coochin is in Queensland (QLD).Does postcode 4310 cover more than one suburb?Yes. Postcode 4310 covers 26 localities, so the postcode alone does not identify Coochin. Browse other postcodes in Queensland, or widen the search to every Australian postcode.