ITO may refer to:
- Hilo International Airport, IATA airport code
- Indium tin oxide, a transparent conductor
- Information Technology Outsourcing
- International Trade Organization
- IT/Operations, an old (but still frequently used) name for HP Operations Manager, a software monitoring suite.
- Jewish Territorialist Organization
- Inventory turnover, a measure of the number of times inventory is sold or used in a certain period of time.
- Involuntary Treatment Order, typically for psychiatric treatment