Sylvania is a suburb, in southern Sydney, in the state of New South Wales, Australia 22 kilometres south of the Sydney central business district in the Sutherland Shire. Sylvania is mostly residential but also contains areas of native bushland and some commercial developments on the Princes Highway and Port Hacking Road. Sylvania Heights is a locality in the western part of the suburb. Sylvania Waters and Kangaroo Point share the same postcode (2224).