Home Postcode finder NSW Greigs Flat Greigs Flat postcode NSW Greigs Flat is a locality in New South Wales covered by postcode 2549. Postcode 2549 State or territory New South Wales (NSW) Region NSW Country West Add a free Greigs Flat business listing Be the first listing in Greigs Flat Common questionsWhat is the postcode for Greigs Flat?Greigs Flat, NSW has the postcode 2549.What state is Greigs Flat in?Greigs Flat is in New South Wales (NSW).Does postcode 2549 cover more than one suburb?Yes. Postcode 2549 covers 9 localities, so the postcode alone does not identify Greigs Flat. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.