Laenna township
- County:
- Logan County
- County Seat:
- No
- Area (mi²):
- 35.05
- State:
- Illinois
Laenna township is located in Logan County, Illinois. Laenna township has a 2026 population of 507. Laenna township is currently declining at a rate of -0.2% annually and its population has decreased by -1.93% since the most recent census, which recorded a population of 517 in 2020.
The median household income in Laenna township is $74,531 with a poverty rate of 20.76%. The median age in Laenna township is 51 years: 48.5 years for males, and 51.2 years for females. For every 100 females there are 114.0 males.