Home Postcode finder NSW Charlestown Charlestown postcode NSW Charlestown is a locality in New South Wales covered by postcode 2290. Postcode 2290 State or territory New South Wales (NSW) Region Hunter Add a free Charlestown business listing More business listings in Charlestown Businesses in Charlestown123 Financial GroupSmith Street, Charlestown NSW, Australia · 02 4920 7886Awesome Water Filters1 Pillapai Street, Charlestown NSW 2290, Australia · 1800 789 781Better Online Degrees801-215 Pacific Highway · 61416086257 Common questionsWhat is the postcode for Charlestown?Charlestown, NSW has the postcode 2290.What state is Charlestown in?Charlestown is in New South Wales (NSW).Does postcode 2290 cover more than one suburb?Yes. Postcode 2290 covers 10 localities, so the postcode alone does not identify Charlestown. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.