NEC (disambiguation)
- Media Rating Council
- NEC
- NEC Blue Rockets
- NEC Green Rockets
- NEC Group
- NEC Nijmegen
- NEC Red Rockets
- NEK EAD
- National Economic Commission
- National Economic Council (United Kingdom)
- National Economic Council (United States)
- National Elections Commission
- National Electoral Commission (Somaliland)
- National Electrical Code
- National Electrostatics Corporation
- National Emission Ceiling
- National Empowerment Center
- National Engineering College
- National Enterprise Corporation
- National Enterprises Corporation FC
- National Executive Committee for Space-Based Positioning, Navigation and Timing
- National Executive Committee of the African National Congress
- National Executive Committee of the Labour Party
- National Executive of the Bharatiya Janata Party
- National Exhibition Centre
- National Extension College
- Native Education Centre
- Nauru Electoral Commission
- Navy Enlisted Classification
- Necrotizing enterocolitis
- Negro Ensemble Company
- Nepal Engineering Council
- Network-enabled capability
- New Engineering Contract
- New England Coalition
- New England College
- New England Conservatory
- Niagara Escarpment Commission
- Nine Entertainment
- No effect concentration
- Non-Euclidean crystallographic group
- North Eastern Council
- North Egypt Conference
- Northeast Conference
- Northeast Corridor
- Northeastern Conference
- Nueva Ecija Capitals
- Nueva Ecija Rice Vanguards
- Numerical Electromagnetics Code
- Sudan National Elections Commission