| National Agricultural Cooperative Marketing Federation Of India Ltd. | delhi | 56 | |
| National AIDS Control Organisation | delhi | 7 | |
| National AIDS Research Institute | maharashtra | 1 | |
| National Aluminium Company Limited | odisha | 124 | |
| National Anti-Doping Agency | central government | 3 | |
| National Archives of India | delhi | 33 | |
| National Assessment and Accrediation Council | karnataka | 32 | |
| National Atlas and Thematic Mapping Organisation | west bengal | 21 | |
| National Atmospheric Research Laboratory | andhra pradesh | 233 | |
| National Authority Chemical Weapons Convention | delhi | 7 | |
| National Automotive Testing and R&D Infrastructure Project | central government | 2 | |
| National Ayurveda Research Institute For Panchakarma | kerala | 2 | |
| National AYUSH Mission | kerala | 5 | |
| National Backward Classes Finance and Development Corporation | delhi | 3 | |
| National Bal Bhavan | delhi | 17 | |
| National Bank for Agriculture and Rural Development | central government | 479 | |
| National Biodiversity Authority | tamil nadu | 25 | |
| National Board of Examinations | delhi | 13 | |
| National Book Trust, India | delhi | 17 | |
| National Botanical Research Institute | uttar pradesh | 19 | |
| National Brain Research Centre | central government | 57 | |
| National Brain Research Centre | haryana | 26 | |
| National Building Organisation | delhi | 1 | |
| National Buildings Construction Corporation Limited | delhi | 107 | |
| National Bureau of Agriculturally Important Microorganisms | uttar pradesh | 10 | |