Hamilton
- County:
- Hancock County
- County Seat:
- No
- Area (mi²):
- 3.561
- State:
- Illinois
Hamilton is a city located in Hancock County, Illinois. Hamilton has a 2026 population of 2,662. Hamilton is currently declining at a rate of -1% annually and its population has decreased by -2.95% since the most recent census, which recorded a population of 2,743 in 2020.