Home Postcodes by state QLD 4300 Postcode 4300 4300 is the postcode for 10 localities in QLD: Augustine Heights, Bellbird Park, Brookwater, Camira, Carole Park, Gailes and 4 more. Localities with postcode 4300Augustine HeightsQLDBellbird ParkQLDBrookwaterQLDCamiraQLDCarole ParkQLDGailesQLDGoodnaQLDSpringfieldQLDSpringfield CentralQLDSpringfield LakesQLD Postcode 4300 State or territory Queensland (QLD) Localities 10 Council area Ipswich Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4287 · Postcode 4301