Lerna
- County:
- Coles County
- County Seat:
- No
- Area (mi²):
- 0.115
- State:
- Illinois
Lerna is a village located in Coles County, Illinois. Lerna has a 2026 population of 218. Lerna is currently declining at a rate of 0% annually and its population has decreased by -1.36% since the most recent census, which recorded a population of 221 in 2020.
The median household income in Lerna is $67,679 with a poverty rate of 14.61%. The median age in Lerna is 31.4 years: 31.5 years for males, and 30.8 years for females. For every 100 females there are 107.3 males.