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| COMMONWEALTH CEASEFIRE MONITORING FORCE (ZIMBABWE - RHODESIA) | |
| COMMONWEALTH CLOTHING FACTORY | |
| COMMONWEALTH HORSE | |
| COMMONWEALTH MILITARY TRAINING TEAM, UGANDA | |
| COMMONWEALTH NAVAL FORCES (AMALGAMATED COLONIAL NAVAL FORCES FROM 1901 TO FORMATION OF RAN IN 1911) | |
| COMMONWEALTH ORDNANCE FACTORY | |
| COMMONWEALTH WAR GRAVES COMMISSION | |
| COMPANIES, AUSTRALIAN ARMY SERVICE CORPS | |
| COMPOSITE ANTI AIRCRAFT REGIMENTS | |
| CONCERT PARTIES | |
| CONSTRUCTION SQUADRONS (ENGINEERS) | |
| CONVALESCENT DEPOTS | |
| CONVALESCENT HOMES | |
| COOKING AND CATERING SCHOOLS | |
| COOKING AND CATERING UNITS | |
| CORANGAMITE LIGHT HORSE | |
| CORMORAN | |
| CORONATION CONTINGENT (EDWARD VII) 1903 | |
| CORONATION CONTINGENT (ELIZABETH II) 1953 | |
| CORONATION CONTINGENT (GEORGE VI) 1937 | |
| CORONATION CONTINGENT (GEORGE V) 1911 | |
| 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 | |