| Code | Name | Region |
|---|---|---|
| AUCGA | Coolgardie | WA |
| AUCOB | Coolibah | NT |
| AUCOU | Coolum | QLD |
| AUCOM | Cooma | NSW |
| AUCKM | Coomba Park | NSW |
| AUCOO | Coomera | QLD |
| AUYMN | Coominya | QLD |
| AUCOJ | Coonabarabran | NSW |
| AUCNB | Coonamble | NSW |
| AUCNW | Coonawarra | SA |
| AUCPS | Coopers Plains | QLD |
| AUCRJ | Coorabie | SA |
| AUCOG | Cooranbong | NSW |
| AUCPR | Coorparoo | QLD |
| AUCMD | Cootamundra | NSW |
| AUCRL | Coral Bay | WA |
| AUCRS | Coral Sea | |
| AUCIE | Collie | WA |
| AUOOC | Collingwood | VIC |
| AUKCE | Collinsville | QLD |
| AUIWS | Collinswood | SA |
| AUCUL | Columboola | QLD |
| AUCMO | Como | NSW |
| AUORN | Concord | NSW |
| AUHDC | Condah | VIC |
| AUCDE | Condamine | QLD |
| AUCBX | Condobolin | NSW |
| AUCVP | Connells Point | NSW |
| AUCO2 | Connewarre | VIC |
| AUCPD | Coober Pedy | SA |
| AUCEI | Coode Island | VIC |
| AUCEE | Cooee | TAS |
| AUCXE | Coogee | NSW |
| AUCDA | Cooinda | NT |
| AUCTN | Cooktown | QLD |
| AUCLB | Coolabah | NSW |
| AUCLH | Coolah | NSW |
| AUCZY | Cluny | QLD |
| AUCYD | Clyde | NSW |
| AUS2A | Clyde | VIC |
| AUCAZ | Cobar | NSW |
| AUOBR | Cobram | VIC |
| AUCBG | Coburg | VIC |
| AUCTI | Cockatoo Island | WA |
| AUCNC | Coconut Island | QLD |
| AUDGQ | Codrington | VIC |
| AUCUQ | Coen | QLD |
| AUCFS | Coffs Harbour | NSW |
| AUGIR | Coghills Creek | VIC |
| AUXCO | Colac | VIC |