Home Postcode finder NSW Great Mackerel Beach Great Mackerel Beach postcode NSW Great Mackerel Beach is a locality in New South Wales covered by postcode 2108. Postcode 2108 State or territory New South Wales (NSW) Region Frenchs Forest Add a free Great Mackerel Beach business listing Be the first listing in Great Mackerel Beach Common questionsWhat is the postcode for Great Mackerel Beach?Great Mackerel Beach, NSW has the postcode 2108.What state is Great Mackerel Beach in?Great Mackerel Beach is in New South Wales (NSW).Does postcode 2108 cover more than one suburb?Yes. Postcode 2108 covers 3 localities, so the postcode alone does not identify Great Mackerel Beach. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.