Home Postcode finder NSWDL Summer Hill Summer Hill postcode NSWDL Summer Hill is a locality in New South Wales covered by postcode 2421. Postcode 2421 State or territory New South Wales (NSWDL) Region Hunter Add a free Summer Hill business listing More business listings in Summer Hill Businesses in Summer HillAKD Painting19 Gower Street, Summer Hill New South Wales 2130, Australia · 0474 854 369AKD Painting19 Gower Street, Summer Hill New South Wales 2130, Australia · 0474 854 369AKD Painting19 Gower Street, Summer Hill New South Wales 2130, Australia · 0474 854 369 Common questionsWhat is the postcode for Summer Hill?Summer Hill, NSWDL has the postcode 2421.What state is Summer Hill in?Summer Hill is in New South Wales (NSWDL).Does postcode 2421 cover more than one suburb?Yes. Postcode 2421 covers 7 localities, so the postcode alone does not identify Summer Hill. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.