| Inter-University Centre for Astronomy and Astrophysics | central government | 5 | |
| International Advanced Research Centre for Powder Metallurgy and New Materials | telangana | 4 | |
| International Centre For Drinking Water Quality | delhi | 1 | |
| International Centre for Environment Audit and Sustainable Development | rajasthan | 1 | |
| International Centre For Genetic Engineering And Biotechnology | delhi | 2 | |
| International Institute for Population Sciences | maharashtra | 22 | |
| International Institute for Population Sciences | central government | 1 | |
| International Institute of Information Technology | telangana | 13 | |
| International Institute of Information Technology | odisha | 4 | |
| International Relations Division, National Council Of Educational Research And Traning | delhi | 2 | |
| Investor Education And Protection Fund Authority | delhi | 3 | |
| Ircon Infrastructure & Services Limited | delhi | 9 | |
| IRCON International Limited | delhi | 113 | |
| IRCTC Indian Railways | delhi | 22 | |
| Islamic University of Science & Technology | jammu kashmir | 64 | |
| Islands Integrated Development Corporation Limited | andaman nicobar islands | 24 | |
| ITI Limited | karnataka | 5 | |
| ITI Limited | kerala | 1 | |
| ITI Limited | uttar pradesh | 2 | |