
Otter Creek township
- County:
- LaSalle County
- County Seat:
- No
- Area (mi²):
- 35.811
- State:
- Illinois
Otter Creek township is located in LaSalle County, Illinois. Otter Creek township has a 2025 population of 2,643. Otter Creek township is currently growing at a rate of 0.11% annually but its population has decreased by -0.75% since the most recent census, which recorded a population of 2,663 in 2020.
The average household income in Otter Creek township is $89,882 with a poverty rate of 24.01%. The median age in Otter Creek township is 42.7 years: 42.5 years for males, and 42.8 years for females.