Home Postcode finder NSW Mystery Bay Mystery Bay postcode NSW Mystery Bay is a locality in New South Wales covered by postcode 2546. Postcode 2546 State or territory New South Wales (NSW) Region NSW Country West Add a free Mystery Bay business listing Be the first listing in Mystery Bay Common questionsWhat is the postcode for Mystery Bay?Mystery Bay, NSW has the postcode 2546.What state is Mystery Bay in?Mystery Bay is in New South Wales (NSW).Does postcode 2546 cover more than one suburb?Yes. Postcode 2546 covers 17 localities, so the postcode alone does not identify Mystery Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.