Home Postcode finder NSW Greta Main Greta Main postcode NSW Greta Main is a locality in New South Wales covered by postcode 2325. Postcode 2325 State or territory New South Wales (NSW) Region Hunter Add a free Greta Main business listing Be the first listing in Greta Main Common questionsWhat is the postcode for Greta Main?Greta Main, NSW has the postcode 2325.What state is Greta Main in?Greta Main is in New South Wales (NSW).Does postcode 2325 cover more than one suburb?Yes. Postcode 2325 covers 27 localities, so the postcode alone does not identify Greta Main. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.