Home Postcode finder NSW Merrill Merrill postcode NSW Merrill is a locality in New South Wales covered by postcode 2581. Postcode 2581 State or territory New South Wales (NSW) Region Canberra Add a free Merrill business listing Be the first listing in Merrill Common questionsWhat is the postcode for Merrill?Merrill, NSW has the postcode 2581.What state is Merrill in?Merrill is in New South Wales (NSW).Does postcode 2581 cover more than one suburb?Yes. Postcode 2581 covers 17 localities, so the postcode alone does not identify Merrill. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.