Home Postcode finder NSW Dargan Dargan postcode NSW Dargan is a locality in New South Wales covered by postcode 2786. Postcode 2786 State or territory New South Wales (NSW) Region Nepean Add a free Dargan business listing Be the first listing in Dargan Common questionsWhat is the postcode for Dargan?Dargan, NSW has the postcode 2786.What state is Dargan in?Dargan is in New South Wales (NSW).Does postcode 2786 cover more than one suburb?Yes. Postcode 2786 covers 5 localities, so the postcode alone does not identify Dargan. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.