As of the 2010 census, its population was 2,894 and it contained 1,144 housing units.

[4] According to the 2010 census, the township has a total area of 29.46 square miles (76.3 km2), of which 29.44 square miles (76.2 km2) (or 99.93%) is land and 0.02 square miles (0.052 km2) (or 0.07%) is water.

[4] (This list is based on USGS data and may include former settlements.)

The township contains fifteen cemeteries: Beatty, Bedunnah, Churchill, Concord, Eden, Forest Hill, Heaton, McKinstry, Olcott, Record, Todd, Transier, Turner, Union and Whiteford.

Sparta Township residents may obtain a library card at the Aurora Public Library in Aurora.