Ilion
- County:
- Herkimer County
- County Seat:
- No
- Area (mi²):
- 2.493
- State:
- New York
Ilion is a village located in Herkimer County, New York. Ilion has a 2026 population of 7,559. Ilion is currently declining at a rate of -0.2% annually and its population has decreased by -1.37% since the most recent census, which recorded a population of 7,664 in 2020.