As of the 2010 census, its population was 612 and it contained 263 housing units.

It was probably named for Charles Carroll of Carrollton, a signer of the Declaration of Independence.

Abraham Carroll, a resident of the area, may have influenced the choice.

[3] According to the 2010 census, the township has a total area of 37.29 square miles (96.6 km2), all land.

[2] The township contains seven cemeteries: Lebanon, Michael, Sandusky, Stunkard, Weaver, Woodlawn and Workheiser.