Home Postcode finder NSW Glenrock Glenrock postcode NSW Glenrock is a locality in New South Wales covered by postcode 2337. Postcode 2337 State or territory New South Wales (NSW) Region Hunter Add a free Glenrock business listing Be the first listing in Glenrock Common questionsWhat is the postcode for Glenrock?Glenrock, NSW has the postcode 2337.What state is Glenrock in?Glenrock is in New South Wales (NSW).Does postcode 2337 cover more than one suburb?Yes. Postcode 2337 covers 25 localities, so the postcode alone does not identify Glenrock. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.