Home Postcodes by state QLD 4705 Postcode 4705 4705 is the postcode for 5 localities in QLD: Clarke Creek, Lotus Creek, Mackenzie River, Marlborough and Mount Gardiner. Localities with postcode 4705Clarke CreekQLDLotus CreekQLDMackenzie RiverQLDMarlboroughQLDMount GardinerQLD Postcode 4705 State or territory Queensland (QLD) Localities 5 Council area Isaac; Livingstone Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4704 · Postcode 4706