
Harmon township
- County:
- Lee County
- County Seat:
- No
- Area (mi²):
- 35.864
- State:
- Illinois
Harmon township is located in Lee County, Illinois. Harmon township has a 2025 population of 337. Harmon township is currently declining at a rate of -0.88% annually and its population has decreased by -3.16% since the most recent census, which recorded a population of 348 in 2020.
The average household income in Harmon township is $84,739 with a poverty rate of 11.42%. The median age in Harmon township is 39.9 years: 34.1 years for males, and 48.4 years for females.