Home Postcodes by state NSW 2175 Postcode 2175 2175 is the postcode for Horsley Park, NSW. Localities with postcode 2175Horsley ParkNSW Postcode 2175 State or territory New South Wales (NSW) Localities 1 Council area Fairfield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2174 · Postcode 2176