Home Postcodes by state QLD 4421 Postcode 4421 4421 is the postcode for 2 localities in QLD: Goranba and Tara. Localities with postcode 4421GoranbaQLDTaraQLD Postcode 4421 State or territory Queensland (QLD) Localities 2 Council area Western Downs Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4420 · Postcode 4422