Home Postcode finder NSW Brierfield Brierfield postcode NSW Brierfield is a locality in New South Wales covered by postcode 2454. Postcode 2454 State or territory New South Wales (NSW) Region NSW North Coast Add a free Brierfield business listing Be the first listing in Brierfield Common questionsWhat is the postcode for Brierfield?Brierfield, NSW has the postcode 2454.What state is Brierfield in?Brierfield is in New South Wales (NSW).Does postcode 2454 cover more than one suburb?Yes. Postcode 2454 covers 13 localities, so the postcode alone does not identify Brierfield. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.