Home Postcode finder NSW Lewinsbrook Lewinsbrook postcode NSW Lewinsbrook is a locality in New South Wales covered by postcode 2311. Postcode 2311 State or territory New South Wales (NSW) Region Hunter Add a free Lewinsbrook business listing Be the first listing in Lewinsbrook Common questionsWhat is the postcode for Lewinsbrook?Lewinsbrook, NSW has the postcode 2311.What state is Lewinsbrook in?Lewinsbrook is in New South Wales (NSW).Does postcode 2311 cover more than one suburb?Yes. Postcode 2311 covers 11 localities, so the postcode alone does not identify Lewinsbrook. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.