Home Postcode finder NSW Croom Croom postcode NSW Croom is a locality in New South Wales covered by postcode 2527. Postcode 2527 State or territory New South Wales (NSW) Region Illawarra Add a free Croom business listing Be the first listing in Croom Common questionsWhat is the postcode for Croom?Croom, NSW has the postcode 2527.What state is Croom in?Croom is in New South Wales (NSW).Does postcode 2527 cover more than one suburb?Yes. Postcode 2527 covers 8 localities, so the postcode alone does not identify Croom. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.