Home Postcodes by state QLD 4346 Postcode 4346 4346 is the postcode for Marburg, QLD. Localities with postcode 4346MarburgQLD Postcode 4346 State or territory Queensland (QLD) Localities 1 Council area Ipswich Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4345 · Postcode 4347