La Harpe
- County:
- Hancock County
- County Seat:
- No
- Area (mi²):
- 1.364
- State:
- Illinois
La Harpe is a city located in Hancock County, Illinois. La Harpe has a 2025 population of 1,137. La Harpe is currently declining at a rate of -0.61% annually and its population has decreased by -3.15% since the most recent census, which recorded a population of 1,174 in 2020.
The average household income in La Harpe is $65,290 with a poverty rate of 9.67%.The median age in La Harpe is 50.1 years: 53 years for males, and 47.3 years for females.