Home Postcode finder QLD North Johnstone North Johnstone postcode QLD North Johnstone is a locality in Queensland covered by postcode 4885. Postcode 4885 State or territory Queensland (QLD) Region North QLD Add a free North Johnstone business listing Be the first listing in North Johnstone Common questionsWhat is the postcode for North Johnstone?North Johnstone, QLD has the postcode 4885.What state is North Johnstone in?North Johnstone is in Queensland (QLD).Does postcode 4885 cover more than one suburb?Yes. Postcode 4885 covers 9 localities, so the postcode alone does not identify North Johnstone. Browse other postcodes in Queensland, or widen the search to every Australian postcode.