| National Agricultural Cooperative Marketing Federation Of India Ltd. | delhi | 5 | |
| National Agricultural Innovation Project | central government | 3 | |
| National AIDS Control Organisation | delhi | 8 | |
| National AIDS Research Institute | maharashtra | 1 | |
| National Aluminium Company Limited | odisha | 30 | |
| National Anti-Doping Agency | central government | 2 | |
| National Archives of India | delhi | 8 | |
| National Assessment and Accrediation Council | karnataka | 4 | |
| National Atlas and Thematic Mapping Organisation | west bengal | 4 | |
| National Atmospheric Research Laboratory | andhra pradesh | 8 | |
| National Authority Chemical Weapons Convention | delhi | 5 | |
| National Automotive Testing and R&D Infrastructure Project | central government | 1 | |
| National Ayurveda Research Institute For Panchakarma | kerala | 1 | |
| National AYUSH Mission | kerala | 2 | |
| National Backward Classes Finance and Development Corporation | delhi | 1 | |
| National Bal Bhavan | delhi | 13 | |
| National Bank for Agriculture and Rural Development | central government | 16 | |
| National Biodiversity Authority | tamil nadu | 15 | |
| National Board of Examinations | delhi | 4 | |
| National Book Trust, India | delhi | 5 | |
| National Botanical Research Institute | uttar pradesh | 4 | |
| National Brain Research Centre | haryana | 21 | |
| National Brain Research Centre | central government | 5 | |
| National Buildings Construction Corporation Limited | delhi | 93 | |
| National Bureau of Agriculturally Important Microorganisms | uttar pradesh | 1 | |