Home Postcode finder NSW Mount Knowles Mount Knowles postcode NSW Mount Knowles is a locality in New South Wales covered by postcode 2850. Postcode 2850 State or territory New South Wales (NSW) Region NSW Country West Add a free Mount Knowles business listing Be the first listing in Mount Knowles Common questionsWhat is the postcode for Mount Knowles?Mount Knowles, NSW has the postcode 2850.What state is Mount Knowles in?Mount Knowles is in New South Wales (NSW).Does postcode 2850 cover more than one suburb?Yes. Postcode 2850 covers 77 localities, so the postcode alone does not identify Mount Knowles. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.