Home Postcodes by state NSW 2161 Postcode 2161 2161 is the postcode for 4 localities in NSW: Guildford, Guildford West, Old Guildford and Yennora. Localities with postcode 2161GuildfordNSWGuildford WestNSWOld GuildfordNSWYennoraNSW Postcode 2161 State or territory New South Wales (NSW) Localities 4 Council area Cumberland; Fairfield Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2160 · Postcode 2162