Home Postcodes by state NSW 2559 Postcode 2559 2559 is the postcode for 2 localities in NSW: Blairmount and Claymore. Localities with postcode 2559BlairmountNSWClaymoreNSW Postcode 2559 State or territory New South Wales (NSW) Localities 2 Council area Campbelltown Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2558 · Postcode 2560