Home Postcode finder NSW Balcolyn Balcolyn postcode NSW Balcolyn is a locality in New South Wales covered by postcode 2264. Postcode 2264 State or territory New South Wales (NSW) Region Gosford Add a free Balcolyn business listing Be the first listing in Balcolyn Common questionsWhat is the postcode for Balcolyn?Balcolyn, NSW has the postcode 2264.What state is Balcolyn in?Balcolyn is in New South Wales (NSW).Does postcode 2264 cover more than one suburb?Yes. Postcode 2264 covers 14 localities, so the postcode alone does not identify Balcolyn. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.