| Institute of Microbial Technology | chandigarh | 3 | |
| Institute of Minerals and Materials Technology | central government | 4 | |
| Institute of Nano Science and Technology | punjab | 53 | |
| Institute Of National Importance | odisha | 1 | |
| Institute Of Nuclear Medicine And Allied Sciences | delhi | 14 | |
| Institute of Pesticide Formulation Technology | haryana | 5 | |
| Institute Of Petroleum Safety, Health & Environment Management | goa | 1 | |
| Institute Of Pharmaceutical Education Boradi | maharashtra | 1 | |
| Institute of Pharmaceutical Sciences | punjab | 2 | |
| Institute Of Public Health | west bengal | 2 | |
| Institute of Rural Management | gujarat | 3 | |
| Institute of Secretariat Training and Management | delhi | 5 | |
| Institute of Seismological Research | gujarat | 1 | |
| Institute Of Serology | west bengal | 4 | |
| Institutional Strengthening of Gram Panchayats Project | west bengal | 1 | |
| Instrumentation Limited | kerala | 1 | |
| Integral Coach Factory | tamil nadu | 4 | |
| Integrated Coastal And Marine Area Management Project Directorate | tamil nadu | 1 | |
| Integrated Test Range | odisha | 4 | |
| Intelligence Bureau | delhi | 6 | |
| Intelligent Communication Systems India Limited | delhi | 7 | |
| Inter University Accelerator Centre | delhi | 5 | |
| Inter-State Council Secretariat | delhi | 2 | |
| Inter-University Center For Biomedical Research & Superspeciality Hospital | kerala | 3 | |
| Inter-University Centre for Astronomy and Astrophysics | maharashtra | 1 | |