Olio Township, Woodford County, Illinois

Olio Township is located in Woodford County, Illinois. As of the 2010 census, its population was 4,931 and it contained 1,879 housing units.

The largest named community in Olio Township is the city of Eureka, the Woodford County seat.

Geography
According to the 2010 census, the township has a total area of 31.45 sqmi, of which 31.41 sqmi (or 99.87%) is land and 0.03 sqmi (or 0.10%) is water.