Home Postcode finder NSW Thornleigh Thornleigh postcode NSW Thornleigh is a locality in New South Wales covered by postcode 2120. Postcode 2120 State or territory New South Wales (NSW) Region Pymble Add a free Thornleigh business listing More business listings in Thornleigh Businesses in ThornleighAction Indoor Sports17 Sefton Road · (02) 9875 2144Allwood Stairs3/8 Pioneer Ave, Thornleigh NSW 2120, Australia · 0294844004Buffalo Security14A Railway Parade, Thornleigh New South Wales 2120, Australia · 0298090204 Common questionsWhat is the postcode for Thornleigh?Thornleigh, NSW has the postcode 2120.What state is Thornleigh in?Thornleigh is in New South Wales (NSW).Does postcode 2120 cover more than one suburb?Yes. Postcode 2120 covers 3 localities, so the postcode alone does not identify Thornleigh. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.