Osage Township is located in LaSalle County, Illinois.

As of the 2010 census, its population was 279 and it contained 128 housing units.

[2] Osage Township was formed from Eagle Township sometime prior to September, 1856.

According to the 2010 census, the township has a total area of 38.3 square miles (99 km2), all land.

This LaSalle County, Illinois location article is a stub.