Home Postcode finder NSW Bowna Bowna postcode NSW Bowna 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 Bowna business listing Be the first listing in Bowna Common questionsWhat is the postcode for Bowna?Bowna, NSW has the postcode 2644.What state is Bowna in?Bowna 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 Bowna. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.