Home Postcode finder NSW Grosses Plain Grosses Plain postcode NSW Grosses Plain is a locality in New South Wales covered by postcode 2627. Postcode 2627 State or territory New South Wales (NSW) Region Canberra Add a free Grosses Plain business listing Be the first listing in Grosses Plain Common questionsWhat is the postcode for Grosses Plain?Grosses Plain, NSW has the postcode 2627.What state is Grosses Plain in?Grosses Plain is in New South Wales (NSW).Does postcode 2627 cover more than one suburb?Yes. Postcode 2627 covers 10 localities, so the postcode alone does not identify Grosses Plain. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.