IGT may refer to:
Biology and medicine
- Impaired glucose tolerance, in prediabetes
Technology
- International Game Technology, an American gambling equipment manufacturer
- International Game Technology (1975–2015), a former American gambling equipment manufacturer
- Integrated Telecom Technology(IgT), a former semiconductor company
Other
- Interlinear Glossed Text, linguistic gloss between lines
- Indicazione Geografica Tipica, Italian wine classification
- Iowa gambling task, decision making simulation
- Magas Airport, Russian Republic of Ingushetia, IATA code