
Olio township
- County:
- Woodford County
- County Seat:
- No
- Area (mi²):
- 31.433
- State:
- Illinois
Olio township is located in Woodford County, Illinois. Olio township has a 2025 population of 4,691. Olio township is currently growing at a rate of 0.19% annually but its population has decreased by -0.19% since the most recent census, which recorded a population of 4,700 in 2020.
The average household income in Olio township is $77,465 with a poverty rate of 15.3%. The median age in Olio township is 40 years: 32.1 years for males, and 44.8 years for females.