| | | |
| CORONATION CONTINGENTS | |
| CORPS OF STAFF CADETS | |
| CORPS TROOPS SUPPLY COMPANIES | |
| COUNTRY WOMEN'S ASSOCIATION | |
| COWRA PRISONER OF WAR CAMP | |
| CRUISER ADMIRAL HIPPER | |
| CRUISER BARTOLOMEO COLLEONI | |
| CRUISER SCHARNHORST | |
| CSF CAMDEN | |
| CSF EAST SALE | |
| CSF LAVERTON | |
| CSF POINT COOK | |
| CSFS | |
| CUSA | |
| CWGC | |
| CYCLIST UNITS | |
D unit names | |
| DANISH FORCES | |
| DARLING DOWNS LIGHT HORSE | |
| DARLING DOWNS REGIMENT | |
| DARWIN FORTRESS | |
| DARWIN MOBILE FORCE | |
| DEFENCE CANTEENS SERVICE | |
| DEMOLITION UNITS | |
| DENTAL UNITS | |
| DEPARTMENT OF AIR | |
| DEPARTMENT OF DEFENCE | |
| DEPARTMENT OF EXTERNAL AFFAIRS | |
| DEPARTMENT OF EXTERNAL TERRITORIES | |
| DEPARTMENT OF HOME SECURITY | |