Osage township
- County:
- LaSalle County
- County Seat:
- No
- Area (mi²):
- 38.294
- State:
- Illinois
Osage township is located in LaSalle County, Illinois. Osage township has a 2026 population of 241. Osage township is currently declining at a rate of 0% annually and its population has decreased by -0.82% since the most recent census, which recorded a population of 243 in 2020.
The median household income in Osage township is $58,250 with a poverty rate of 14.36%. The median age in Osage township is 59 years: 63.2 years for males, and 58.3 years for females. For every 100 females there are 116.1 males.