- Central Europe Pipeline Management Organization Board of Directors
- Central Europe Pipeline System (CEPS)
- Centres of Excellence
- Chairman of the Military Committee
- Combined Joint Chemical, Biological, Radiological and Nuclear Defence Task Force
- Civil Emergency Planning (CEP)
- Civil Emergency Planning Committee (CEPC)
- Civilian Intelligence Committee (CIC)
- Collective defence
- Commitment to operations and missions
- CPD (Committee for Public Diplomacy)
- Committee for Standardization (CS)
- Committee of the Chiefs of Military Medical Services in NATO
- Committee on Proliferation (COP)
- Communications and information programmes
- Comprehensive Approach
- Comprehensive Political Guidance
- Conference of National Armaments Directors (CNAD)
- Consensus decision-making at NATO
- Consultation process
- Consultation, Command and Control Board (C3B)
- Contributing to the establishment of an African Standby Force
- Council Operations and Exercises Committee (COEC)
- Counter-piracy operations
- Countering Improvised Explosive Devices (C-IEDs)
- Crisis management
- Cyber attacks, Defending against
- Conventional Arms Control, High-Level Task Force on -
- Capabilities, Improving NATO’s
- Contact Point Embassies, NATO -
- Conventional arms control, NATO’s role in -
- Caucasus and Central Asia, The NATO Secretary General’s Special Representative for the -
- Committee, Working by -