Home Postcode finder NSW Biala Biala postcode NSW Biala is a locality in New South Wales covered by postcode 2581. Postcode 2581 State or territory New South Wales (NSW) Region Canberra Add a free Biala business listing Be the first listing in Biala Common questionsWhat is the postcode for Biala?Biala, NSW has the postcode 2581.What state is Biala in?Biala is in New South Wales (NSW).Does postcode 2581 cover more than one suburb?Yes. Postcode 2581 covers 17 localities, so the postcode alone does not identify Biala. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.