| ILS Oy | |
| Type: | Osakeyhtiö[1] |
| Location City: | Turku |
| Location Country: | Finland |
| Key People: | Jyrki Lehtonen (CEO) |
| Services: | Naval architecture |
| Revenue: | €1,092,000 (2016)[2] |
| Num Employees: | 12 (2016) |
ILS Oy (formerly Insinööritoimisto Lehtonen & Siirilä Oy) is a Finnish engineering company that specializes in winter navigation and the design and development of ice-class ships.
The company was involved in the building of an eco-friendly icebreaker Polaris, which entered service in early 2017.[3]