Home Postcode finder NSW Blue Bay Blue Bay postcode NSW Blue Bay is a locality in New South Wales covered by postcode 2261. Postcode 2261 State or territory New South Wales (NSW) Region Gosford Add a free Blue Bay business listing Be the first listing in Blue Bay Common questionsWhat is the postcode for Blue Bay?Blue Bay, NSW has the postcode 2261.What state is Blue Bay in?Blue Bay is in New South Wales (NSW).Does postcode 2261 cover more than one suburb?Yes. Postcode 2261 covers 15 localities, so the postcode alone does not identify Blue Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.