Ohio Grove Township is located in Mercer County, Illinois.

As of the 2010 census, its population was 279 and it contained 116 housing units.

[2] Ohio Grove Township changed its name from Ohio sometime after 1921.

According to the 2010 census, the township has a total area of 36.81 square miles (95.3 km2), all land.

This Mercer County, Illinois location article is a stub.