| Code | Name | Region |
|---|---|---|
| AUCRR | Carrington | NSW |
| AUCAD | Carrum Downs | VIC |
| AUCSI | Casino | NSW |
| AUCTC | Castle Cove | NSW |
| AUCHI | Castle Hill | NSW |
| AUCSX | Castlecrag | NSW |
| AUCSM | Castlemaine | VIC |
| AUCAS | Castlereagh | NSW |
| AUCZA | Casuarina | NSW |
| AUS9S | Casula | NSW |
| AUCAP | Capalaba | QLD |
| AUCBI | Cape Barren Island | TAS |
| AUCCU | Cape Cuvier | WA |
| AUDON | Cape Don | NT |
| AUCQP | Cape Flattery | QLD |
| AUCLT | Cape Lambert | WA |
| AUCLN | Cape Leeuwin | WA |
| AUCPN | Cape Preston | WA |
| AUCPL | Capel | WA |
| AUCBD | Carabooda | WA |
| AUCBO | Carboor | VIC |
| AUCRK | Carbrook | QLD |
| AUUUP | Carbunup | WA |
| AUCDF | Cardiff | NSW |
| AUCGL | Carey Gully | SA |
| AUCG4 | Cargo | NSW |
| AUCAR | Carina Heights | QLD |
| AUCDL | Carindale | QLD |
| AUCNE | Carine | WA |
| AUCRG | Caringbah | NSW |
| AUCFI | Camfield | NT |
| AUCML | Camooweal | QLD |
| AUCPA | Campania | TAS |
| AUCPB | Campbell | ACT |
| AUCFL | Campbellfield | VIC |
| AUCPC | Campbells Creek | VIC |
| AUCBN | Campbelltown | NSW |
| AUCMT | Campbelltown | SA |
| AUCMP | Camperdown | NSW |
| AUCPW | Camperdown | VIC |
| AUCBR | Canberra | ACT |
| AUCNN | Canning Vale/perth | WA |
| AUCNT | Cannington | WA |
| AUCAH | Cannon Hill | QLD |
| AUCBY | Canobie | QLD |
| AUCDS | Canoelands | NSW |
| AUJWI | Canowindra | NSW |
| AUNCT | Canterbury | NSW |
| AUVRY | Canterbury | VIC |
| AUNBC | Canungra | QLD |