Home Postcodes by state QLD 4104 Postcode 4104 4104 is the postcode for Yeronga, QLD. Localities with postcode 4104YerongaQLD Postcode 4104 State or territory Queensland (QLD) Localities 1 Council area Brisbane Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4103 · Postcode 4105