Home Postcode finder NSWDL Sylvania Southgate Sylvania Southgate postcode NSWDL Sylvania Southgate is a locality in New South Wales covered by postcode 2224. Postcode 2224 State or territory New South Wales (NSWDL) Region Illawarra Add a free Sylvania Southgate business listing Be the first listing in Sylvania Southgate Common questionsWhat is the postcode for Sylvania Southgate?Sylvania Southgate, NSWDL has the postcode 2224.What state is Sylvania Southgate in?Sylvania Southgate is in New South Wales (NSWDL).Does postcode 2224 cover more than one suburb?Yes. Postcode 2224 covers 4 localities, so the postcode alone does not identify Sylvania Southgate. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.