Home Postcode finder NSWDL Smithtown Smithtown postcode NSWDL Smithtown is a locality in New South Wales covered by postcode 2440. Postcode 2440 State or territory New South Wales (NSWDL) Region NSW North Coast Add a free Smithtown business listing More business listings in Smithtown Businesses in SmithtownSmithtown Public School30-38 Cannane St · 02 65674529 Common questionsWhat is the postcode for Smithtown?Smithtown, NSWDL has the postcode 2440.What state is Smithtown in?Smithtown is in New South Wales (NSWDL).Does postcode 2440 cover more than one suburb?Yes. Postcode 2440 covers 48 localities, so the postcode alone does not identify Smithtown. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.