Home Postcode finder NSW Holbrook Holbrook postcode NSW Holbrook is a locality in New South Wales covered by postcode 2644. Postcode 2644 State or territory New South Wales (NSW) Region Canberra Add a free Holbrook business listing More business listings in Holbrook Businesses in HolbrookHolbrook Public School146 Albury St · 02 60362021St Patrick's Primary SchoolAlbury St · 02 60362288 Common questionsWhat is the postcode for Holbrook?Holbrook, NSW has the postcode 2644.What state is Holbrook in?Holbrook is in New South Wales (NSW).Does postcode 2644 cover more than one suburb?Yes. Postcode 2644 covers 10 localities, so the postcode alone does not identify Holbrook. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.