Home Postcodes by state NSW 2877 Postcode 2877 2877 is the postcode for 9 localities in NSW: Boona Mount, Condobolin, Derriwong, Eremerang, Euabalong, Euabalong West and 3 more. Localities with postcode 2877Boona MountNSWCondobolinNSWDerriwongNSWEremerangNSWEuabalongNSWEuabalong WestNSWKiacatooNSWMount HopeNSWMulguthrieNSW Postcode 2877 State or territory New South Wales (NSW) Localities 9 Council area Lachlan; Cobar; Mainly Cobar, partly Lachlan; Forbes Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 2876 · Postcode 2878