| CTOC | Camel Trophy Owners Club 
| Others |
| CToC | Cheese Tornado of California
| Others |
| CTOC | Chemicals Technical Options Committee
| Others |
| CTOC | Childrens Theatre of Charleston
| Others |
| CTOC | Chinese Taipei Olympic Committee
| Others |
| CTOC | Christchurch Transport Operations Centre
| Others |
| CTOC | Citizens Transportation Oversight Committee
| Others |
| CTOC | City of Trees Orienteering Club
| Others |
| CTOC | Cognitive Therapy Orange County
| Others |
| CTOC | Combating Transnational Organized Crime
| Others |
| CTOC | Command Tactical Operations Center
| Others |
| CTOC | Communications Technician (communications Branch) Chief Petty Officer
| Others |
| CTOC | Convention on Transnational Organized Crime
| Others |
| CTOC | Corolla Twincam Owners Club
| Others |
| CTOC | Corps Tactical Operations Center
| Others |
| CTOC | Counter Transnational Organized Crime
| Others |
| CTOC | Countering Transnational Organized Crime
| Others |
| CTOC | Crosstour Owners Club
| Others |
| CTOC | Cryptologic (communications Branch) Chief Petty Officer
| Others |
| CTOC | Cybersecurity Tactical Operations Center
| Others |
| CTOC | Cybersecurity Training and Operations Center
| Others |