Home Postcode finder NSW Erowal Bay Erowal Bay postcode NSW Erowal Bay is a locality in New South Wales covered by postcode 2540. Postcode 2540 State or territory New South Wales (NSW) Region NSW Country West Add a free Erowal Bay business listing Be the first listing in Erowal Bay Common questionsWhat is the postcode for Erowal Bay?Erowal Bay, NSW has the postcode 2540.What state is Erowal Bay in?Erowal Bay is in New South Wales (NSW).Does postcode 2540 cover more than one suburb?Yes. Postcode 2540 covers 68 localities, so the postcode alone does not identify Erowal Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.