Home Postcode finder NSW Osterley Osterley postcode NSW Osterley is a locality in New South Wales covered by postcode 2324. Postcode 2324 State or territory New South Wales (NSW) Region Hunter Add a free Osterley business listing More business listings in Osterley Businesses in OsterleyMt Kanwary Public School145 Hinton Rd · 02 49872596 Common questionsWhat is the postcode for Osterley?Osterley, NSW has the postcode 2324.What state is Osterley in?Osterley is in New South Wales (NSW).Does postcode 2324 cover more than one suburb?Yes. Postcode 2324 covers 22 localities, so the postcode alone does not identify Osterley. Browse other postcodes in New South Wales, or widen the search to every Australian postcode.