Home Postcode finder NSW Elvina Bay Elvina Bay postcode NSW Elvina Bay is a locality in New South Wales covered by postcode 2105. Postcode 2105 State or territory New South Wales (NSW) Region Frenchs Forest Add a free Elvina Bay business listing Be the first listing in Elvina Bay Common questionsWhat is the postcode for Elvina Bay?Elvina Bay, NSW has the postcode 2105.What state is Elvina Bay in?Elvina Bay is in New South Wales (NSW).Does postcode 2105 cover more than one suburb?Yes. Postcode 2105 covers 5 localities, so the postcode alone does not identify Elvina Bay. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.