Janesville
- County:
- Cumberland County
- County Seat:
- No
- Area (mi²):
- 0.061
- State:
- Illinois
Janesville is a CDP located in Cumberland County, Illinois Illinois. Unfortunately, the data for this location is currently limited or unavailable.
The median age in Janesville is 50.1 years: 45.9 years for males, and 0 years for females. For every 100 females there are 143.8 males.