Home Postcodes by state NSW 2204 Postcode 2204 2204 is the postcode for 3 localities in NSW: Marrickville, Marrickville Metro and Marrickville South. Localities with postcode 2204MarrickvilleNSWMarrickville MetroNSWMarrickville SouthNSW Postcode 2204 State or territory New South Wales (NSW) Localities 3 Council area Inner West Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2203 · Postcode 2205