Home Postcode finder NSW Johns River Johns River postcode NSW Johns River is a locality in New South Wales covered by postcode 2443. Postcode 2443 State or territory New South Wales (NSW) Region NSW North Coast Add a free Johns River business listing Be the first listing in Johns River Common questionsWhat is the postcode for Johns River?Johns River, NSW has the postcode 2443.What state is Johns River in?Johns River is in New South Wales (NSW).Does postcode 2443 cover more than one suburb?Yes. Postcode 2443 covers 19 localities, so the postcode alone does not identify Johns River. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.