Home Postcodes by state NSW 2131 Postcode 2131 2131 is the postcode for Ashfield, NSW. Localities with postcode 2131AshfieldNSW Postcode 2131 State or territory New South Wales (NSW) Localities 1 Council area Inner West Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2130 · Postcode 2132