Home Postcodes by state QLD 4830 Postcode 4830 4830 is the postcode for 5 localities in QLD: Burketown, Doomadgee, Gregory, Gregory Downs and Nicholson. Localities with postcode 4830BurketownQLDDoomadgeeQLDGregoryQLDGregory DownsQLDNicholsonQLD Postcode 4830 State or territory Queensland (QLD) Localities 5 Council area Burke; Doomadgee Council area based on Australian Bureau of Statistics data (ASGS Edition 3), CC BY 4.0. Postcode 4829 · Postcode 4849