
Harmon
- County:
- Lee County
- County Seat:
- No
- Area (mi²):
- 0.218
- State:
- Illinois
Harmon is a village located in Lee County, Illinois. Harmon has a 2025 population of 115. Harmon is currently declining at a rate of -0.86% annually and its population has decreased by -3.36% since the most recent census, which recorded a population of 119 in 2020.
The average household income in Harmon is $79,524 with a poverty rate of 12.35%. The median age in Harmon is 52.7 years: 58.5 years for males, and 48.6 years for females.