Home Postcodes by state NSW 2041 Postcode 2041 2041 is the postcode for 3 localities in NSW: Balmain, Balmain East and Birchgrove. Localities with postcode 2041BalmainNSWBalmain EastNSWBirchgroveNSW Postcode 2041 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 2040 · Postcode 2042