| Acronym | Definition |
|---|
| IGR | Internally Generated Revenue |
| IGR | Insect Growth Regulator |
| IGR | Institut Gustave-Roussy (French cancer institute) |
| IGR | Intelligenter Generatorregelung |
| IGR | Internal Gas Recirculation |
| IGR | Information Gain Ratio |
| IGR | Intergovernmental Review |
| IGR | Intergenic Region (genetics) |
| IGR | Intergovernmental Revenue |
| IGR | In Game Reset (consoles) |
| IGR | Industry-Government Relations |
| IGR | Internet Game Room |
| IGR | Indiana Guard Reserve |
| IGR | Internal Growth Rate |
| IGR | Iguazu, Misiones, Argentina - Iguazu International (Airport Code) |
| IGR | Intergroup Representative |
| IGR | Interactive Grand Rounds |
| IGR | International Gas Report (publication; Platts) |
| IGR | International Government Relations (Group) |
| IGR | Insulated Gate Rectifier |
| IGR | Inverted GPS Range |
| IGR | Implied Growth Rate |
| IGR | Investment Grade Rating |
| IGR | Internet Gateway Router (computer networking) |
| IGR | Institute of Genome Research |
| IGR | Inter Galactic Republic (fanfiction) |