ILS
- ILS (company)
- ILS Law College
- Ils (musician)
- Inscriptiones Latinae Selectae
- Instrument landing system
- Insurance-Linked Securities (ILS)
- Integrated library system
- Integrated logistics support
- Intermediate Life Support
- International Launch Services
- International Lenin School
- International Life Saving Federation
- Inventory Locator Service
- Israeli new shekel
- Iterated local search
- Them (2006 film)