
Hainesville
- County:
- Lake County
- County Seat:
- No
- Area (mi²):
- 1.847
- State:
- Illinois
Hainesville is a village located in Lake County, Illinois. Hainesville has a 2025 population of 3,455. Hainesville is currently declining at a rate of -0.49% annually and its population has decreased by -2.4% since the most recent census, which recorded a population of 3,540 in 2020.
The average household income in Hainesville is $149,785 with a poverty rate of 12.49%. The median age in Hainesville is 40.2 years: 43.7 years for males, and 38.8 years for females.