Gilman
- County:
- Iroquois County
- County Seat:
- No
- Area (mi²):
- 3.278
- State:
- Illinois
Gilman is a city located in Iroquois County, Illinois. Gilman has a 2026 population of 1,674. Gilman is currently growing at a rate of 0.06% annually but its population has decreased by -3.85% since the most recent census, which recorded a population of 1,741 in 2020.