| I&B | Information and Broadcasting✓ Verified | Agency, Media & Entertainment, Communication, Ministry |
| I&PR | Information & Public Relations✓ Verified | Agency, Communication, Department |
| I4C | Indian Cybercrime Coordination Centre✓ Verified | Agency, Intelligence Agency, Ministry, Legal, Technology |
| IBM | International Business Machines Corporation✓ Verified | Company, Internet, Technology |
| ICAN | International Campaign to Abolish Nuclear Weapons✓ Verified | Association, Military, Weapon, Energy, Nuclear Energy, Organization |
| ICEA | India Cellular & Electronics Association✓ Verified | Association, Electronics, Forum |
| ICTP | International Container Transshipment Port✓ Verified | Facility, Industry, Logistics, Transport, Water Transport |
| IGP | Inspector General of Police✓ Verified | Designation / Rank, Police |
| IGRS | Investor Grievance Redressal System✓ Verified | Finance, Investment, Stock Exchange, Stocks and Trading, Framework |
| ILU | I Love You✓ Verified | Communication, Internet, Slang |
| IMF | International Monetary Fund✓ Verified | Finance, Organization |
| INC | Indian National Congress✓ Verified | Political Party |
| Int Pd | Interest Paid✓ Verified | Finance, Banking |
| INTERPOL | International Criminal Police Organization✓ Verified | Agency, Intelligence Agency, Police, Law Enforcement, Organization |
| IOS | iPhone OS (formerly)✓ Verified | Operating System |
| IOU | Investor Owned Utility✓ Verified | Business, Finance |
| IPC | Integrated Food Security Phase Classification✓ Verified | Agriculture, Food, Health, Measurement Unit |
| IPCC | Intergovernmental Panel on Climate Change✓ Verified | Agency, Environment |
| IPEN | International Pollutants Elimination Network✓ Verified | Agency, Environment, NGO, Safety |
| IPFM | International Panel on Fissile Materials✓ Verified | Association, Military, Weapon, Energy, Nuclear Energy, Group |
| IPL | Indian Premier League✓ Verified | Cricket |
| IQ | Intelligence Quotient✓ Verified | Measurement Unit, Psychology |
| IRCTC | Indian Railway Catering and Tourism Corporation Limited✓ Verified | Business, Company, Transport, Railways, Travel |
| IREP | Integrated Rural Energy Planning✓ Verified | Energy, Policy |
| ISBT | Inter-State Bus Terminus✓ Verified | Facility, Transport, Road Transport |
| IST | India Standard Time✓ Verified | Time, Time Zone |
| ITBP | Indo-Tibetan Border Police✓ Verified | Border, Police |
| ITC | Imperial Tobacco Company of India Limited✓ Verified | Company |